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An investigation of the diet, exercise, sleep, BMI, and health outcomes of autistic adults



Studies of autistic children suggest that restricted eating, reduced physical activity, and sleep disorders are common; however, no studies attempt to broadly describe the diet, exercise, and sleep patterns of autistic adults or consider relationships between lifestyle behaviors and the widely reported increased risks of obesity and chronic conditions. To address this, the authors developed the largest study of lifestyle patterns of autistic adults and assessed their relationships to body mass index, health outcomes, and family history.


We administered an anonymized, online survey to n = 2386 adults (n = 1183 autistic) aged 16–90 years of age. We employed Fisher’s exact tests and binomial logistic regression to describe diet, exercise, and sleep patterns; mediation of seizure disorders on sleep; body mass index (BMI); relationships of lifestyle factors to BMI, cardiovascular conditions, and diabetic conditions; and sex differences among autistic adults.


Autistic adults, and particularly autistic females, exhibit unhealthy diet, exercise, and sleep patterns; they are also more likely to be underweight or obese. Limited sleep duration and high rates of sleep disturbances cannot be accounted for by epilepsy or seizure disorders. Lifestyle factors are positively related to higher risk of cardiovascular conditions among autistic males, even more than family history.


Our sample may not be representative of all autistic and non-autistic people, as it primarily comprised individuals who are white, female, have a high school education or higher, and reside in the UK. Our sampling methods may also exclude some individuals on the autism spectrum, and particularly those with moderate to severe intellectual disability. This is a cross-sectional sample that can test for relationships between factors (e.g., lifestyle factors and health outcomes) but cannot assess the direction of these relationships.


Autistic adults are less likely to meet minimal health recommendations for diet, exercise, and sleep—and these unhealthy behaviors may relate to excess risk of cardiovascular conditions. Although the present study can only provide preliminary, correlational evidence, our findings suggest that diet, exercise, and sleep should be considered and further investigated as key targets for reducing the now widely reported and dramatically increased risks of health comorbidity and premature death among autistic individuals compared to others. Physicians should work cooperatively with patients to provide health education and develop individualized strategies for how to better manage challenges with diet, exercise, and sleep.


Autism spectrum conditions (henceforth autism) are lifelong, neurodevelopmental conditions characterized by social and communication difficulties, repetitive behaviors, restricted interests, and differences in cognitive profile, including atypical sensory perception, motor abilities, and intellectual ability [1]. The prevalence of autism is one to two percent in the general population, and this figure has risen over time, likely due to changes in diagnostic criteria and better detection of the condition [2]. There is a sex-bias in autism, with males being diagnosed approximately three to four times more often than females [2]. As autism is lifelong, and prevalence of the condition has increased in recent years, greater numbers of autistic individuals are reaching adulthood; and in turn, this requires greater recognition of the challenges faced by autistic individuals across the lifespan.

Autistic individuals may be more likely to develop a variety of physical and mental health conditions, including Type II diabetes, certain cancers, respiratory conditions, and cardiovascular conditions [3,4,5,6,7], with relatively greater risk for autistic females compared to autistic males [3, 4, 7]; and these conditions may contribute to increased risk of premature mortality seen among autistic individuals [8, 9]. Estimates of risk of premature mortality are alarming, suggesting that autistic individuals die 16–38.5 years younger on a average than expected [8, 9], with greatest risk among autistic females and those with intellectual disability (ID) [9].

It is currently unclear why autistic individuals have a greater health burden; however, lifestyle factors are of particular interest, as autistic individuals are more likely to be overweight or obese [3, 6, 10,11,12,13,14,15]. Being overweight or obese contributes significantly to risk of developing chronic physical health conditions, including diabetic and cardiovascular conditions [6, 16]. Poor nutrition, limited physical activity, and sleep disorders all appear to be risk factors for obesity among autistic children [17,18,19,20,21]. The authors are not aware of any studies that comprehensively describe the lifestyle factors of autistic adults, despite their potential to be key targets for intervention that improve health outcomes.

Regarding diet, autistic children are more likely to have disordered or atypical eating patterns (including food refusal, limited diet/picky eating, pica, anorexia, avoidant, and restricted food intake disorder (ARFID), binge-eating, etc.), with some estimates suggesting that 70% of autistic children have atypical eating behaviors [22,23,24,25]. Individuals with eating disorders are also more likely to be autistic and have higher autistic traits than others [26,27,28,29]. Atypical eating behaviors may be self-imposed due to differences in cognitive style (including behavioral inflexibility), increased likelihood for engaging in emotional eating behaviors (particularly among autistic females), and/or sensory sensitivities [22, 30,31,32]. Dietary choices may also be restricted due to high rates of food allergies and gastrointestinal conditions among autistic individuals [3, 4, 33,34,35,36].

Finally, caregivers may impose dietary restrictions as interventions to reduce autism symptoms or challenging behaviors, though there is mixed evidence of their effectiveness [35, 37,38,39]. Feeding problems and restricted eating of autistic children affect nutrition, which may have knock on effects on growth, autism symptoms, risk of malnutrition or obesity, and health status [22, 40,41,42,43]. A few, small-scale studies suggest that these trends may persist into adulthood [44,45,46]. As yet, there are no large-scale studies that monitor dietary restrictions, nutrition, or eating behavior in autistic adults over the age of 35, or in autistic adults without ID.

It is also clear that autistic children are less likely to engage in physical activity than non-autistic children [14, 20, 47, 48]. Autistic individuals appear to be less interested in exercise due to differences in social motivation, increased screen time, and differences in motor ability [12, 18, 48,49,50,51,52,53,54]. Some interventions aimed to increase physical activity may reduce autism symptoms and improve some fitness and metabolic indicators [55,56,57,58]. Despite some evidence that autistic children, and particularly autistic girls, engage less in physical activity as they age [12, 59,60,61], there are currently no large-scale studies that indicate whether patterns of inactivity persist into adulthood, the degree to which autistic adults engage in physical activity, or whether any interventions might be useful in increasing physical activity levels among autistic adults [62].

Regarding sleep, autistic individuals of all ages are more likely to have a variety of sleep disorders and limited sleep duration [4, 5, 47, 63, 64]. Among autistic children, sleep disturbances are associated with symptom severity, younger age, Hispanic ethnicity, higher intellectual quotient (IQ), ADHD, behavioral dysregulation/problems, lower adaptive function, epilepsy/seizures, maternal autistic traits, poorer child mental health, poorer maternal mental health (including anxiety and depression), poorer maternal and paternal physical health, lower caregiver/parental education, and lower family income [51, 64,65,66,67,68]. In a large sample of autistic children, obesity was associated with sleep difficulties and melatonin use, further emphasizing the relationships between sleep quality, metabolism, and markers of overall health within this population [69]. However, there are only three studies and one meta-analysis, all with relatively small sample sizes, that consider specific sleep disorders and/or sleep traits in depth among autistic adults–with some evidence that social impairment and biological sex may be related to sleep dysfunction [63, 64, 70, 71].

Overall, evidence suggests that autistic children and adolescents are unable to meet the minimum recommendations for diet, exercise, and sleep that promote good health and prevent chronic disease; yet, there are no studies of whether or not these patterns are also broadly seen in autistic adults. The current study examines whether obesity-related dietary, exercise, and sleep patterns are seen among autistic adults, as well as whether these lifestyle factors contribute to the elevated risks of chronic diseases seen among autistic adults.


We developed an anonymous, self-report survey using a cross-sectional, convenience-sampling framework via Qualtrics. The survey included questions on demographics, a short version of the Autism Spectrum Quotient (a measure of autistic traits, AQ-10) [72], and daily habits (including exercise, diet, sleep, disability, and social/sexual history), as well as personal and family medical histories of common medical conditions. The final sample comprised n = 2386 individuals, including n = 1183 autistic individuals and n = 1203 controls. The mean age of the autistic group was 41.04 years of age (standard deviation = 14.41), and the mean age of the control group was 41.86 years (standard deviation = 15.59). Both the autistic and control samples were predominantly composed of females, white individuals, UK residents, and those without ID; however, there were significant group differences in distributions of sex, ethnicity, education, country of residence, BMI, alcohol use, smoking, and intellectual disability status. Table 1 includes a summary of demographic information for the autistic and control groups.

Table 1 Participant demographics

Further information on recruitment, exclusions, and missingness/non-response is available in Addition file 2.


Education level was defined as the highest qualification achieved with the following options: “No formal qualifications,” “Secondary School/High School level qualifications,” “Further vocational qualifications,” “University Undergraduate level qualifications (BA, BSc, etc.),” and “University Postgraduate level qualifications (MA, MSc, PhD, Certificate, etc.),” as a categorical variable. We used a binary representation of ethnicity (white vs. non-white) in our analyses, as we had very few individuals from each non-white ethnic background. Full information on the distribution of participants’ ethnicity is available in Table 1. We derived a variable from country of residence based on the most frequent countries listed with the following options: “UK,” “USA,” “Germany,” “Australia,” and “Other.” We used frequency of current alcohol consumption, as measured by the number of days per week with the following options: “I do not consume alcoholic beverages,” “One to two days per week,” “Three to four days per week,” and “Five to seven days per week,” as an ordinal variable. Finally, we used highest frequency of smoking ever, as measured by the regularity of smoking when smoking most frequently with the following options: “I have never smoked regularly,” “Monthly,” “Weekly,” and “Daily,” to quantify smoking among participants.

Statistical analyses

We used R Version 3.6.2, and specifically the “CrossTable” function from the “gmodels” package for two-tailed Fisher’s exact tests; and the “wilcox.test,” and “glm” functions from the “stats” package for Wilcoxon signed rank tests, and binomial logistic regression analyses, respectively. We used both unadjusted (Fisher’s) and adjusted models (logistic regression) to assess diet, exercise, and sleep patterns of autistic adults; mediation of epilepsy/seizure disorders on sleep disturbances and sleep duration; differences in BMI (weight classes); relationships between diet, exercise, sleep, and family history with cardiovascular and diabetic outcomes; and sex differences across all analyses.

First, we established whether there were differences on average between autistic and non-autistic adults using derived, binary measures: exercising at least once per week, exercising 75 min or more per week, sleeping at least six hours per night, specific sleep disturbances (including difficulty falling asleep, difficulty staying asleep, sleepwalking, sleep talking, bedwetting, frequent night terrors, excessive drowsiness, narcolepsy, and sleep apnea), eating at least five servings of fruit or vegetables on four or more days per week, eating high calorie foods frequently (seven or more times per week), meeting water goals (at least seven glasses/cups of water per day), drinking high sugar beverages frequently (seven or more times per week), drinking caffeinated beverages frequently (seven or more times per week), reporting specific dietary restrictions (including vegan or vegetarian, lactose free, nut free, gluten free, soy free, no fish, other dietary restriction), reporting no dietary restriction, and reporting dietary restriction due to an allergy. As noted above, we used both unadjusted and adjusted models (controlling for biological sex, age, ethnicity, education level, and country of residence). For full details on these items, see Addition file 1: Figs. 1–11.

Analysis of differences in BMI (weight classes)

We derived BMI (kg/m2) and weight classes based on guidance given by the WHO ( and tested differences between autistic and non-autistic individuals in the prevalence of being classified as underweight (BMI of < 18.5), normal range weight (BMI of ≥ 18.5 but < 25.0), overweight (BMI ≥ 25.0 but < 30.0), or obese (BMI of ≥ 30.0). In model two, we used binomial logistic regression and controlled for demographic factors including sex, age, ethnicity, education level, and country of residence, as well as social factors including current alcohol use, and past smoking frequency. In model three, we again used binomial logistic regression and controlled for the same demographic and social history factors, as well as ordinal measures of a variety of lifestyle factors that we expect would impact BMI: exercise frequency, exercise duration, sleep duration, meeting fruit and vegetable goals, eating high calorie foods, drinking high sugar beverages, meeting water goals, drinking caffeinated beverages, sleep disturbance (yes/no), and dietary restriction (yes/no). We ran sensitivity analyses to consider the effects of an interaction between sex and diagnosis on each of the specific weight classes (underweight, normal range, overweight, and obese) for both models two and three and found no significant interactions.

Analysis of health: cardiovascular and diabetic outcomes (sex-stratified)

As mentioned above, we collected medical history data for common non-communicable diseases, including data on lifetime prevalence of cardiovascular and diabetic conditions. For these analyses, we derived two binary variables to indicate whether each individual self-reported any non-communicable cardiovascular condition or separately any non-communicable diabetic condition. For example, an individual who reported high blood pressure would be designated as having a cardiovascular condition. See Addition file 1: Figs. 8 and 9 for further information about the specific cardiovascular and diabetic conditions considered. Similarly, we used self-report data on first-degree biological relatives to derive a binary “Family History” variable to indicate whether participants reported that a family member had any non-communicable cardiovascular or diabetic condition, respectively. As prevalence of health outcomes may depend on biological sex [3, 4, 7], these analyses compared rates of medical conditions among autistic females vs. non-autistic females, and separately, autistic males vs. non-autistic males.

We employed four statistical models to examine the effects of demographics, social history, lifestyle, and family history on risk of cardiovascular and diabetic outcomes between sex-matched groups. We used Fisher’s exact tests for model one and used binomial logistic regression for models two, three, and four. As above, we controlled for demographic and social history factors in model two and demographic, social history factors, and family history in model three. Finally, in model four, we controlled for the same demographic and social history factors, as well as lifestyle factors (specific factors listed above under the Analysis of Differences in BMI (Weight Classes) subsection).

We have previously reported similar results to that of model one and model two for sex-stratified analyses of cardiovascular and diabetic conditions using data from the same sample [7]. We included these analyses in order to provide clear points of comparison for models three and four (controlling for lifestyle factors and family history, respectively), which have not been investigated or reported previously.

Sex differences across all analyses

As noted in the subsections above, we assessed sex differences throughout the study. We conducted additional analyses using binomial logistic regression controlling for age, biological sex, ethnicity, education, country of residence, and the interaction of sex and diagnosis. Where we found a significant interaction between sex and diagnosis, we employed the “glht” function of the “multcomp” package to estimate sex-specific information, where appropriate, we reported sex-specific results in place of the main models in Table 2.

Table 2 Exercise, diet, and sleep patterns of autistic adults compared to non-autistic adults


Even after accounting for biological sex, age, ethnicity, education level, and country of residence, autistic individuals were less likely to meet very minimal health recommendations for diet, exercise, and sleep on nearly all measures tested. Our adjusted regression analyses suggest that for every 10 non-autistic adults that report exercising once per week or for at least 75 min per week, only 6–7 autistic adults report the same. Autistic adults were more likely than non-autistic adults to eat high calorie foods frequently; they were also more likely than non-autistic adults to have every dietary restriction (odds ratios: 1.40–2.44) and sleep disturbance (odds ratios: 1.29–3.46) tested. We found marginally significant differences in the likelihood of meeting daily water goals, drinking high sugar beverages frequently, as well as being nut free or soy free.

There were some significant sex differences of note. Autistic females were less likely to eat five servings of fruits and vegetables on at least four days per week or sleep six hours per night than sex-matched peers; they were more likely than non-autistic females to experience difficulty falling asleep and bedwetting. Interestingly, there were no differences between autistic and non-autistic male groups on these measures. Full results for both unadjusted and adjusted models are summarized in Table 2.

As some studies in children suggest that child seizures/epilepsy may contribute to sleep disturbances and sleep duration [20], we conducted additional regression analyses to test this in an adult population (Addition file 2: Table 2). Interestingly, we found no statistically significant effect from epilepsy or seizure disorders on the likelihood of sleeping six hours per night or incidence of sleep disturbances examined here.

Our results confirm previous findings that autistic individuals are more likely than non-autistic adults to be underweight or obese, as well as less likely to be a healthy weight for all three models. However, we found no statistical differences between the likelihood of autistic and non-autistic individuals being overweight. In addition, lifestyle factors do not explain differences in BMI and only contribute to an attenuation of odds ratios for underweight individuals. Full details are provided in Table 3. Figure 1 also includes the unadjusted BMI for autistic and non-autistic individuals.

Table 3: Differences in the likelihood of being classified as underweight, overweight, or obese among autistic and non-autistic adults
Fig. 1
figure 1

Distribution of BMI among autistic and non-autistic adults. a–d The specific distributions of autistic and non-autistic individuals classified as underweight (a), normal range (b), overweight (c), or obese (d), and e display the full distribution of BMIs for both autistic and non-autistic individuals, based on their self-reported heights and weights

Previous studies suggest that autistic adults are more likely to have cardiovascular and diabetic conditions [3, 4, 7]; however, this study is the first to consider the relationships between lifestyle-related factors, family history, and chronic disease among autistic adults. Interestingly, after controlling for lifestyle-related factors (comparing Model 2 to Model 4), risk of cardiovascular conditions drops from odds ratios of 1.53 to 1.41 and there is no longer a significant difference between autistic males and non-autistic males—suggesting that lifestyle factors may be associated with increased risk of cardiovascular diseases. Surprisingly, when controlling for these same lifestyle-related factors, the relative risk of diabetic conditions among autistic females increases. Finally, in contrast to previous findings [3, 5], our study does not provide strong evidence that there are true group differences between autistic and non-autistic males regarding risk of diabetic conditions, as only Model 1 suggests a significant difference. Full results for all four models are provided in Table 4.

Table 4 The effect of lifestyle factors on risk of cardiovascular and diabetic outcomes between autistic and non-autistic adults, stratified by sex


Our results extend previous findings from children to suggest that autistic adults are less likely to follow even minimal health recommendations for diet, exercise, and sleep, which may affect wider quality of life. A recent latent class analysis of autistic children found relationships between health, weight, engagement in school, ability to make friends, physical activity, sleep habits, and screen time [73]. In addition, autistic children were more likely to be in the classes with negative behaviors and outcomes and far less likely to be in the classes with positive behaviors and outcomes [73]. Further, sleep problems have previously been associated with daytime sedentary behavior and unemployment among autistic adults [70, 74] and with increased mental health difficulties among those who self-report high autistic traits [75]; however, there is no existing literature that considers the effects of diet, exercise, and sleep habits broadly on the quality of life of autistic adults. Considering the widespread challenges faced by autistic adults, failure to meet minimum recommendations for diet, exercise, and sleep could have knock-on effects in a variety of different areas including but not limited to: increasing physical health risks; limiting opportunities for social engagement (which can often be centered around mealtimes or physical activity); worsening the severity of behavioral problems and/or comorbid psychiatric conditions; and increasing likelihood of unemployment, underemployment, or attrition from education. Thus, future research in this area should focus on exploring the possible impacts that lifestyle choices might have on the quality of life of autistic adults.

Our online recruitment methods allowed us to reach a large cohort of autistic individuals across the adult lifespan (aged 16–90 years; mean age approximately 41 years). This is the largest study of its kind and provides perspectives from middle-aged and older autistic adults, who remain a neglected group in autism research. In addition, this is the first study to describe the dietary choices and restrictions of autistic adults in a large population of individuals without ID. The study also includes a large sample of autistic females, who remain underserved in research and clinical practice, despite further increased risks of chronic health conditions and premature mortality (even in comparison with autistic males) [3, 5, 7, 9]. Autistic females may be particularly vulnerable to challenges with sleeping at least six hours per night, difficulty falling asleep, bedwetting, and likelihood of meeting fruit and vegetable goals at least four days per week compared to sex-matched peers. Our sample predominantly comprised females, which was expected based on methodology of using an online, self-report survey [76,77,78,79]. This has likely biased the sample toward the perspectives and experiences of females and in turn will limit its applicability and power in detecting true group differences between autistic and non-autistic males; however, our study fits into a wider narrative suggesting increased challenges and inadequate support for autistic individuals—and particularly autistic females [3,4,5, 7, 9, 80, 81]. Future qualitative research should attempt to establish what types of support would be most effective in trying to improve daily living and functional outcomes for autistic individuals and autistic females specifically.

It has also been suggested that there may be a relationship between epilepsy/seizure disorders, sleep duration, and frequency of sleep disturbances [65]. Yet, our results indicate that at least some autistic individuals experience sleep disturbances and reduced sleep duration independently of epilepsy/seizure disorders. It should be noted that our methodology, by definition, requires that all participants be intellectually and physically able to fill in a self-report survey; it is possible that epilepsy/seizure disorders may play a larger role in sleep duration and sleep disturbances of individuals with greater autism severity and/or ID.

Across all three models, we found that autistic individuals were more likely to be classified as underweight or obese, as well as less likely to be classified as having a normal range BMI. After accounting for factors related to diet, sleep, and exercise, there was a modest attenuation in odds ratios and the significance level for underweight individuals, indicating that lifestyle factors may contribute to some aspects of atypical BMI; however, a statistically significant difference remained between autistic and non-autistic individuals in regard to the likelihood of being classified as underweight, normal range, or obese for BMI. Thus, our results intimate that lifestyle patterns do not fully explain the differences in BMI observed between autistic and non-autistic adults in this sample; however, it is presently unclear whether these persistent differences in BMI can be explained by biases from our sample (detailed below) or other differences common to autism (e.g., genetic mutations, hormonal dysregulation, etc.) [82,83,84,85].

Our results provide the first evidence that unhealthy diet, exercise, and sleep patterns may appreciably relate to the excess risks of cardiovascular conditions seen among autistic adults compared to non-autistic adults [3,4,5, 7], though our methodology is not able to test causality. This is represented by a pattern of attenuation in significance and odds ratios seen uniquely in Model 4 for autistic males. Remarkably, this pattern of attenuation is stronger when accounting for the cumulative effects of lifestyle-related factors even than for family history of a cardiovascular condition. A similar pattern of attenuation in significance is shown among autistic females; however, we did not observe a similar effect on the odds ratios. Thus, this study cannot yet provide evidence of such an effect among autistic females. In addition to providing key information regarding excess health risks, this finding may have wider implications for length and quality of life, as studies suggest that increased health burden contributes to premature death among autistic adults [8, 9]. Future research must work to establish these relationships and identify whether lifestyle behaviors could serve as key targets for intervention for improving long-term outcomes among autistic adults.

Our results also indicate that unhealthy lifestyle-related factors may be related to lower risk of diabetic conditions among autistic females (as odds ratios and significance increase when covarying for diet, exercise, and sleep patterns). While it appears true that these lifestyle factors still affect likelihood of developing diabetic conditions, our results suggest that other factors may more meaningfully contribute to these outcomes, such as genetic mutations [82], hormonal conditions [83,84,85], negative life experiences [86], mental health conditions [3,4,5, 87], and lack of access to healthcare and/or poor quality of healthcare [80, 81]. In particular, this study provided some preliminary evidence that family history of diabetic conditions may contribute more to increased risk of diabetic conditions among autistic females than lifestyle-related factors. As we cannot test causality, the present study cannot determine whether this unexpected pattern is based on true group differences or indicative of reverse causality: autistic females are more likely to make lifestyle changes based on a diagnosis of diabetes or prediabetes.

These findings underscore the importance of timely autism diagnosis, as patterns of unhealthy lifestyle behaviors appear to persist from childhood into adulthood. Although future research is needed, our study provides preliminary, correlational evidence that diet, exercise, and sleep should be investigated further as possible contributors to uniquely increased risks of health burden and premature death among autistic individuals [3,4,5,6,7,8,9]. Thus, physicians should work cooperatively with their autistic patients (and particularly autistic females) to improve health education; monitor challenges with diet, sleep, and exercise; and develop strategies to provide support, in order to reduce risks. Future qualitative research should focus on identifying the causes of these differences (e.g., lack of health education, biological reasons for disruptions, mental health conditions making it harder to manage) and creating mechanisms to provide better support to the autistic community.


Our study employed a self-report measure; thus, it relied on participants to provide an accurate account of their diet, exercise, and sleep patterns, as well as weight, height, physical health history, and family history. Further, social history and lifestyle patterns of autistic individuals are complex and difficult to distill effectively in a few questions; as such, our study only accounts for participants’ current alcohol consumption frequency and the frequency of their smoking when smoking the most, which may not fully capture alcohol and smoking behaviors. Although the survey was anonymized, autistic individuals may have been more candid about their experiences and unhealthy behaviors, due to differences in communication style and/or lessened concerns about adherence to social norms; however, it should be noted that our results align with studies of autistic individuals across all ages, including studies utilizing parent report measures.

The study may also be subject to sampling bias, as we recruited participants via various sources of social media, autism support groups, and autism charities. Although we encouraged participation from both autistic and non-autistic individuals, our advertisement methods may have biased our control population toward individuals with an interest in autism or who suspect they are autistic. We excluded all individuals that reported self-diagnosis of autism, suspected autism, or were awaiting an autism assessment; nevertheless, our results may underestimate true group differences between autistic and non-autistic individuals.

In addition, our study sample may not be representative of all autistic individuals. First, our methodology inherently excluded individuals without internet access. Second, less than 2% of our sample self-identified as having an intellectual, developmental, cognitive, or learning disability (not including specific learning disabilities). Current research into lifestyle-related patterns among autistic adults is heavily biased toward autistic individuals with comorbid ID (particularly regarding diet, as there are no other large-scale studies describing dietary restrictions or quality among autistic adults without ID); yet, it is important to note that the results of this study may not be generalizable to the entire autistic population. Third, although we attempted to recruit a diverse and international sample, several groups (e.g., females, UK residents, individuals with at least a high school education, and individuals of a White/Caucasian ethnicity) were overrepresented in both the autistic and non-autistic groups. Thus, these findings may not be representative of the experiences of all autistic or non-autistic adults and particularly of autistic males. The present study may be underpowered to detect all sex differences and may not accurately represent the experiences or health risks of non-white autistic individuals or those with lower educational achievement. It is possible that this study underestimates true group differences in diet, exercise, sleep, BMI, and health outcomes for diverse and underserved populations, as additional intersections of disability, ethnicity, and socioeconomic status may serve to magnify the effects seen here. Future research must focus on filling these gaps by actively recruiting ethnically diverse autistic individuals, who remain an underserved population in research.

Further, our cross-sectional design limits the conclusions we can draw, and specifically our ability to test the direction of relationships and/or causality. As noted above, we found an inverse relationship between diabetic conditions and lifestyle choices. It may be the case that other, aforementioned biological and environmental factors better explain the excess risk of diabetic conditions among autistic females than do lifestyle factors. Alternatively, our results may be explained by reverse causality. As this study only includes data from one timepoint, future, longitudinal studies should focus on clarifying the relationship between lifestyle choices and risk of diabetic conditions, as well as identifying the biological and environmental factors which contribute most meaningfully to this risk among autistic females.


Overall, despite lower prevalence of smoking and alcohol use, autistic adults are less likely to meet minimal health recommendations for diet, exercise, and sleep than are non-autistic adults, and this may be particularly true for autistic females (compared to sex-matched peers). In particular, our findings provide correlational evidence that unhealthy habits may appreciably relate to excess risk of cardiovascular conditions seen among autistic males (though we cannot test causality). Autistic adults are also more likely to be classified as underweight or obese and less likely to be classified as within the normal weight range regarding BMI; interestingly, atypical BMI is not fully explained by diet, exercise, or sleep patterns. It should be noted that these results may not apply to all autistic individuals and may primarily apply to white, female, UK residents, and those who have completed at least a high school education. However, the present study emphasizes the urgency of developing strategies to better support autistic individuals in making healthy lifestyle choices.

Availability of data and materials

As participants did not consent for their data to be publicly shared, even anonymized, data will be made available to only potential collaborators with ethical approval after they submit a research proposal to the Autism Research Centre, University of Cambridge, UK.



Body Mass Index


Intellectual Disability


Avoidant and Restricted Food Intake Disorder


Intellectual Quotient


Autism Quotient (10 Item shortened version)


  1. American Psychiatric Association. Diagnostic and statistical manual of mental disorders. 5th ed. Arlington: American Psychiatric Publishing, Inc.; 2013.

    Book  Google Scholar 

  2. Maenner MJ, Shaw KA, Baio J, Washington A, Patrick M, DiRienzo M, et al. Prevalence of autism spectrum disorder among children aged 8 years—autism and developmental disabilities monitoring network, 11 sites, United States, 2016. MMWR Surveill Summ. 2020;69:1–12.

    Article  PubMed  PubMed Central  Google Scholar 

  3. Croen LA, Zerbo O, Qian Y, Massolo ML, Rich S, Sidney S, Kripke C. The health status of adults on the autism spectrum. Autism. 2015;19:814–23.

    Article  PubMed  Google Scholar 

  4. Davignon MN, Qian Y, Massolo M, Croen LA. Psychiatric and medical conditions in transition-aged individuals with ASD. Pediatrics. 2018;141:335–45.

    Article  Google Scholar 

  5. Hand BN, Angell AM, Harris L, Carpenter LA. Prevalence of physical and mental health conditions in Medicare-enrolled, autistic older adults. Autism. 2020;24:755–64.

    Article  PubMed  Google Scholar 

  6. Shedlock K, Susi A, Gorman GH, Hisle-Gorman E, Erdie-Lalena CR, Nylund CM. Autism spectrum disorders and metabolic complications of obesity. J Pediatr. 2016;178:183–7.

    Article  PubMed  Google Scholar 

  7. Weir E, Allison C, Warrier V, Baron-Cohen S. Increased prevalence of non-communicable physical health conditions among autistic adults. Autism. 2020.

  8. DaWalt LS, Hong J, Greenberg JS, Mailick MR. Mortality in individuals with autism spectrum disorder: predictors over a 20-year period. Autism. 2019;23:1732–9.

    Article  Google Scholar 

  9. Hirvikoski T, Mittendorfer-Rutz E, Boman M, Larsson H, Lichtenstein P, Bölte S. Premature mortality in autism spectrum disorder. Br J Psychiatry. 2016;208:232–8.

    Article  PubMed  Google Scholar 

  10. Broder-Fingert S, Brazauskas K, Lindgren K, Iannuzzi D, Van Cleave J. Prevalence of overweight and obesity in a large clinical sample of children with autism. Acad Pediatr. 2014;14:408–14.

    Article  PubMed  Google Scholar 

  11. Curtin C, Anderson SE, Must A, Bandini L. The prevalence of obesity in children with autism: a secondary data analysis using nationally representative data from the National Survey of Children’s Health. BMC Pediatr. 2010;10:11.

    Article  PubMed  PubMed Central  Google Scholar 

  12. Healy S, Garcia JM, Haegele JA. Environmental factors associated with physical activity and screen time among children with and without autism spectrum disorder. J Autism Dev Disord. 2018.

    Article  Google Scholar 

  13. Kahathuduwa CN, West BD, Blume J, Dharavath N, Moustaid-Moussa N, Mastergeorge A. The risk of overweight and obesity in children with autism spectrum disorders: a systematic review and meta-analysis. Obes Rev. 2019.

    Article  PubMed  Google Scholar 

  14. McCoy SM, Jakicic JM, Gibbs BB. Comparison of obesity, physical activity, and sedentary behaviors between adolescents with autism spectrum disorders and without. J Autism Dev Disord. 2016;46:2317–26.

    Article  PubMed  Google Scholar 

  15. Zheng Z, Zhang L, Li S, Zhao F, Wang Y, Huang L, et al. Association among obesity, overweight and autism spectrum disorder: a systematic review and meta-analysis. Sci Rep. 2017;7:1697.

    CAS  Google Scholar 

  16. Guh DP, Zhang W, Bansback N, Amarsi Z, Birmingham CL, Anis AH. The incidence of co-morbidities related to obesity and overweight: a systematic review and meta-analysis. BMC Public Health. 2009;9:88.

    Article  PubMed  PubMed Central  Google Scholar 

  17. Curtin C, Jojic M, Bandini LG. Obesity in children with autism spectrum disorders. Harv Rev Psychiatry. 2014;22:93–103.

    Article  PubMed  PubMed Central  Google Scholar 

  18. Dhaliwal KK, Orsso CE, Richard C, Haqq AM, Zwaigenbaum L. Risk factors for unhealthy weight gain and obesity among children with autism spectrum disorder. Int J Mol Sci. 2019;20:3285.

    Article  CAS  PubMed Central  Google Scholar 

  19. Matheson BE, Douglas JM. Overweight and obesity in children with autism spectrum disorder (ASD): a critical review investigating the etiology, development, and maintenance of this relationship. Rev J Autism Dev Disord. 2017;4:142–56.

    Article  Google Scholar 

  20. McCoy SM, Morgan K. Obesity, physical activity, and sedentary behaviors in adolescents with autism spectrum disorder compared with typically developing peers. Autism. 2020;24:387–99.

    Article  PubMed  Google Scholar 

  21. Srinivasan SM, Pescatello LS, Bhat AN. Current perspectives on physical activity and exercise recommendations for children and adolescents with autism spectrum disorders. Phys Ther. 2014;94:875–89.

    Article  PubMed  PubMed Central  Google Scholar 

  22. Cermak SA, Curtin C, Bandini LG. Food selectivity and sensory sensitivity in children with autism spectrum disorders. J Am Diet Assoc. 2010;110:238–46.

    Article  PubMed  PubMed Central  Google Scholar 

  23. Mayes SD, Zickgraf H. Atypical eating behaviors in children and adolescents with autism, ADHD, other disorders, and typical development. Res Autism Spectr Disord. 2019;64:76–83.

    Article  Google Scholar 

  24. Sharp WG, Berry RC, McCracken C, Nuhu NN, Marvel E, Saulnier CA, et al. Feeding problems and nutrient intake in children with autism spectrum disorders: a meta-analysis and comprehensive review of the literature. J Autism Dev Disord. 2013;43(9):2159–73.

    Article  PubMed  Google Scholar 

  25. Solmi F, Bentivegna F, Bould H, Mandy W, Kothari R, Rai D, et al. Trajectories of autistic social traits in childhood and adolescence and disordered eating behaviours at age 14 years: a UK general population cohort study. J Child Psychol Psychiatry. 2020.

    Article  PubMed  PubMed Central  Google Scholar 

  26. Baron-Cohen S, Jaffa T, Davies S, Auyeung B, Allison C, Wheelwright S. Do girls with anorexia nervosa have elevated autistic traits? Mol Autism. 2013;4:24.

    Article  PubMed  PubMed Central  Google Scholar 

  27. Dell’Osso L, Carpita B, Gesi C, Cremone IM, Corsi M, Massimetti E, et al. Subthreshold autism spectrum disorder in patients with eating disorders. Compr Psychiatry. 2018;81:66–72.

    Article  PubMed  Google Scholar 

  28. Huke V, Turk J, Saeidi S, Kent A, Morgan JF. Autism spectrum disorders in eating disorder populations: a systematic review. Eur Eat Disord Rev. 2013;21:345–51.

    Article  PubMed  Google Scholar 

  29. Tchanturia K, Smith E, Weineck F, Fidanboylu E, Kern N, Treasure J, et al. Exploring autistic traits in anorexia: a clinical study. Mol Autism. 2013;4:44.

    Article  PubMed  PubMed Central  Google Scholar 

  30. Esposito M, Sloan J, Nappo R, Fadda R, Fotia F, Napoli E, et al. Sensory processing, gastrointestinal symptoms and parental feeding practices in the explanation of food selectivity: clustering children with and without autism. Int J Autism Relat Disabil. 2019;2:1.

    Google Scholar 

  31. Wallace GL, Richard E, Wolff A, Nadeau M, Zucker N. Increased emotional eating behaviors in children with autism: Sex differences and links with dietary variety. Autism. 2020.

  32. Zhu V, Dalby-Payne J. Feeding difficulties in children with autism spectrum disorder: aetiology, health impacts and psychotherapeutic interventions. J Paediatr Child Health. 2019;55:1304–8.

    Article  PubMed  Google Scholar 

  33. Kang V, Wagner GC, Ming X. Gastrointestinal dysfunction in children with autism spectrum disorders. Autism Res. 2014;7:501–6.

    Article  PubMed  Google Scholar 

  34. McElhanon BO, McCracken C, Karpen S, Sharp WG. Gastrointestinal symptoms in autism spectrum disorder: a meta-analysis. Pediatrics. 2014;133:872–83.

    Article  PubMed  Google Scholar 

  35. Ristori MV, Quagliariello A, Reddel S, Ianiro G, Vicari S, Gasbarrini A, et al. Autism, gastrointestinal symptoms and modulation of gut microbiota by nutritional interventions. Nutrients. 2019;11:2812.

    Article  CAS  PubMed Central  Google Scholar 

  36. Tan Y, Thomas S, Lee BK. Parent-reported prevalence of food allergies in children with autism spectrum disorder: national health interview survey, 2011–2015. Autism Res. 2019;12:802–5.

    Article  PubMed  Google Scholar 

  37. Adams JB, Audhya T, Geis E, Gehn E, Fimbres V, Pollard EL, et al. Comprehensive nutritional and dietary intervention for autism spectrum disorder—a randomized, controlled 12-month trial. Nutrients. 2018;10:3.

    Article  CAS  Google Scholar 

  38. Criado KK, Sharp WG, McCracken CE, De Vinck-Baroody O, Dong L, Aman MG, et al. Overweight and obese status in children with autism spectrum disorder and disruptive behavior. Autism. 2018;22:450–9.

    Article  PubMed  Google Scholar 

  39. González-Domenech PJ, Díaz Atienza F, García Pablos C, Fernández Soto ML, Martínez-Ortega JM, Gutiérrez-Rojas L. Influence of a combined gluten-free and casein-free diet on behavior disorders in children and adolescents diagnosed with autism spectrum disorder: a 12-month follow-up clinical trial. J Autism Dev Disord. 2019.

    Article  Google Scholar 

  40. Barnhill K, Gutierrez A, Ghossainy M, Marediya Z, Devlin M, Sachdev P, et al. Dietary status and nutrient intake of children with autism spectrum disorder: a case-control study. Res Autism Spectr Disord. 2018;50:51–9.

    Article  Google Scholar 

  41. Cheng B, Zhu J, Yang T, Guo M, Lai X, Li Q, et al. Vitamin A deficiency increases the risk of gastrointestinal comorbidity and exacerbates core symptoms in children with autism spectrum disorder. Pediatr Res. 2020;26:1–6.

    Google Scholar 

  42. Esteban-Figuerola P, Canals J, Fernández-Cao JC, Arija VV. Differences in food consumption and nutritional intake between children with autism spectrum disorders and typically developing children: a meta-analysis. Autism. 2019;23:1079–95.

    Article  PubMed  Google Scholar 

  43. Robea M-A, Luca A-C, Ciobica A. Relationship between vitamin deficiencies and co-occurring symptoms in autism spectrum disorder. Medicina. 2020;56:5.

    Article  Google Scholar 

  44. Kinnaird E, Norton C, Pimblett C, Stewart C, Tchanturia K. Eating as an autistic adult: an exploratory qualitative study. PLoS ONE. 2019;14:8.

    Article  CAS  Google Scholar 

  45. Kuschner ES, Eisenberg IW, Orionzi B, Simmons WK, Kenworthy L, Martin A, Wallace GL. A preliminary study of self-reported food selectivity in adolescents and young adults with autism spectrum disorder. Res Autism Spectr Disord. 2015;15:53–9.

    Article  PubMed  Google Scholar 

  46. Spek AA, van Rijnsoever W, van Laarhoven L, Kiep M. Eating problems in men and women with an autism spectrum disorder. J Autism Dev Disord. 2020;50:1748–55.

    Article  PubMed  Google Scholar 

  47. Healy S, Aigner CJ, Haegele JA, Patterson F. Meeting the 24-hr movement guidelines: an update on US youth with autism spectrum disorder from the 2016 National Survey of Children’s Health. Autism Res. 2019;12:941–51.

    Article  PubMed  PubMed Central  Google Scholar 

  48. Healy S, Patterson F, Williams E, Lozano AJ, Hanlon AL, Obrusnikova I. Rethinking daily movement behaviors of children wth autism spectrum disorder: meeting the 24-hour movement guidelines. EUJAPA. 2020;13:8.

    Article  Google Scholar 

  49. Hillier A, Buckingham A, Schena D. Physical activity among adults with autism: participation, attitudes, and barriers. Percept Mot Skills. 2020.

  50. Lawson LM, Foster L. Sensory patterns, obesity, and physical activity participation of children with autism spectrum disorder. Am J Occup Ther. 2016;70:5.

    Article  Google Scholar 

  51. Liu R, Dong H, Wang Y, Lu X, Li Y, Xun G, et al. Sleep problems of children with autism may independently affect parental quality of life. Child Psychiatry Hum Dev. 2020.

    Article  PubMed  PubMed Central  Google Scholar 

  52. Must A, Phillips SM, Curtin C, Anderson SE, Maslin M, Lividini K, et al. Comparison of sedentary behaviors between children with autism spectrum disorders and typically developing children. Autism. 2014;18:376–84.

    Article  PubMed  Google Scholar 

  53. Odeh CE, Gladfelter AL, Stoesser C, Roth S. Comprehensive motor skills assessment in children with autism spectrum disorder yields global deficits. Int J Dev Disabil. 2020;89:1–11.

    Google Scholar 

  54. Stanish HI, Curtin C, Must A, Phillips S, Maslin M, Bandini LG. Enjoyment, barriers, and beliefs about physical activity among adolescents with and without autism spectrum disorder. Adapt Phys Activity Q APAQ. 2015;32:4.

    Google Scholar 

  55. Dickinson K, Place M. A randomised control trial of the impact of a computer-based activity programme upon the fitness of children with autism. Autism Res Treat. 2014.

  56. Ferreira JP, Ghiarone T, Cabral Júnior CR, Furtado GE, Moreira Carvalho H, Machado-Rodrigues AM, et al. Effects of physical exercise on the stereotyped behavior of children with autism spectrum disorders. Medicina. 2019;55:10.

    Article  Google Scholar 

  57. Howells K, Sivaratnam C, May T, Lindor E, McGillivray J, Rinehart N. Efficacy of group-based organised physical activity participation for social outcomes in children with autism spectrum disorder: a systematic review and meta-analysis. J Autism Dev Disord. 2019;49:3290–308.

    Article  PubMed  Google Scholar 

  58. Toscano CVA, Carvalho HM, Ferreira JP. Exercise effects for children with autism spectrum disorder: metabolic health, autistic traits, and quality of life. Percept Mot Skills. 2018;125:126–46.

    Article  PubMed  Google Scholar 

  59. Jones RA, Downing K, Rinehart NJ, et al. Physical activity, sedentary behavior and their correlates in children with Autism Spectrum Disorder: a systematic review. PLoS ONE. 2017;12:e0172482.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  60. MacDonald M, Esposito P, Ulrich D. The physical activity patterns of children with autism. BMC Res Notes. 2011;4:422.

    Article  PubMed  PubMed Central  Google Scholar 

  61. Memari AH, Ghaheri B, Ziaee V, Kordi R, Hafizi S, Moshayedi P. Physical activity in children and adolescents with autism assessed by triaxial accelerometry. Pediatr Obes. 2013;8:150–8.

    Article  CAS  PubMed  Google Scholar 

  62. Hallett R. Physical activity for autistic adults: recommendations for a shift in approach. Autism Adulthood. 2019;1:173–81.

    Article  Google Scholar 

  63. Lugo J, Fadeuilhe C, Gisbert L, Setien I, Delgado M, Corrales M, et al. Sleep in adults with autism spectrum disorder and attention deficit/hyperactivity disorder: a systematic review and meta-analysis. Eur Neuropsychopharmacol. 2020;38:1–24.

    Article  CAS  PubMed  Google Scholar 

  64. Smidt SDE, Lu F, Rao SR, Asato M, Handen BL. Primary caregiver education level and sleep problems in children with autism spectrum disorder. J Sleep Res. 2019;29.

  65. Waddington H, McLay L, Woods L, Whitehouse AJO. Child and family characteristics associated with sleep disturbance in children with autism spectrum disorder. J Autism Dev Disord. 2020.

  66. Malow BA. Sleep disorders, epilepsy, and autism. Ment Retard Dev Disabil Res Rev. 2004;10:122–5.

    Article  PubMed  Google Scholar 

  67. Mazurek MO, Sohl K. Sleep and behavioral problems in children with autism spectrum disorder. J Autism Dev Disord. 2016;46:1906–15.

    Article  PubMed  Google Scholar 

  68. Hollway JA, Aman MG, Butter E. Correlates and risk markers for sleep disturbance in participants of the autism treatment network. J Autism Dev Disord. 2013;43:2830–43.

    Article  PubMed  Google Scholar 

  69. Zuckerman KE, Hill AP, Guion K, Voltolina L, Fombonne E. Overweight and obesity: prevalence and correlates in a large clinical sample of children with autism spectrum disorder. J Autism Dev Disord. 2014;44:1708–19.

    Article  PubMed  PubMed Central  Google Scholar 

  70. Ballester P, Martínez MJ, Javaloyes A, Inda M, Fernández N, Gázquez P, et al. Sleep problems in adults with autism spectrum disorder and intellectual disability. Autism Res. 2019;12:66–79.

    Article  PubMed  Google Scholar 

  71. Jovevska S, Richdale AL, Lawson LP, Uljarević M, Arnold SRC, Trollor JN. Sleep quality in autism from adolescence to old age. Autism Adulthood. 2020.

    Article  Google Scholar 

  72. Allison C, Auyeung B, Baron-Cohen S. Toward brief “red flags” for autism screening: the short autism spectrum quotient and the short quantitative checklist in 1,000 cases and 3,000 controls. J Am Acad Child Adolesc Psychiatry. 2012;51:202–12.

    Article  PubMed  Google Scholar 

  73. Garcia JM, Hahs-Vaughn DL. Health factors, sociability, and academic outcomes of typically developing youth and youth with autism spectrum disorder: a latent class analysis approach. J Autism Dev Disord. 2020.

    Article  PubMed  Google Scholar 

  74. Baker EK, Richdale AL, Hazi A. Employment status is related to sleep problems in adults with autism spectrum disorder and no comorbid intellectual impairment. Autism. 2019;23:531–6.

    Article  PubMed  Google Scholar 

  75. Stewart GR, Corbett A, Ballard C, Creese B, Aarsland D, Hampshire A, et al. Sleep problems and mental health difficulties in older adults who endorse high autistic traits. Res Autism Spectr Disord. 2020;77.

  76. Aerny-Perreten N, Domínguez-Berjón MF, Esteban-Vasallo MD, García-Riolobos C. Participation and factors associated with late or non-response to an online survey in primary care. J Eval Clin Pract. 2015;21:688–93.

    Article  PubMed  Google Scholar 

  77. Cheung KL, ten Klooster PM, Smit C, de Vries H, Pieterse ME. The impact of non-response bias due to sampling in public health studies: A comparison of voluntary versus mandatory recruitment in a Dutch national survey on adolescent health. BMC Public Health. 2017;17.

  78. Cull WL, O’Connor KG, Sharp S, Tang SS. Response rates and response bias for 50 surveys of pediatricians. Health Serv Res. 2005;40:213–26.

    Article  PubMed  PubMed Central  Google Scholar 

  79. Listyowardojo TA, Nap RE, Johnson A. Demographic differences between health care workers who did or did not respond to a safety and organizational culture survey. BMC Res Notes. 2011;4:328.

    Article  PubMed  PubMed Central  Google Scholar 

  80. Mason D, Ingham B, Urbanowicz A, Michael C, Birtles H, Woodbury-Smith M, et al. A systematic review of what barriers and facilitators prevent and enable physical healthcare services access for autistic adults. J Autism Dev Disord. 2019;49:3387–400.

    Article  PubMed  PubMed Central  Google Scholar 

  81. Nicolaidis C, Raymaker D, McDonald K, Dern S, Boisclair WC, Ashkenazy E, et al. Comparison of healthcare experiences in autistic and non-autistic adults: a cross-sectional online survey facilitated by an academic-community partnership. J Gen Intern Med. 2013;28:761–9.

    Article  PubMed  Google Scholar 

  82. Wen Y, Alshikho MJ, Herbert MR. Pathway network analyses for autism reveal multisystem involvement, major overlaps with other diseases and convergence upon MAPK and calcium signaling. PLoS ONE. 2016;11.

  83. Berni TR, Morgan CL, Berni ER, Rees DA. Polycystic ovary syndrome is associated with adverse mental health and neurodevelopmental outcomes. J Clin Endocrinol Metab. 2018;103:2116–25.

    Article  PubMed  Google Scholar 

  84. Cherskov A, Pohl A, Allison C, Zhang H, Payne RA, Baron-Cohen S. Polycystic ovary syndrome and autism: a test of the prenatal sex steroid theory. Transl Psychiatry. 2018;8(1).

  85. Pohl A, Cassidy S, Auyeung B, Baron-Cohen S. Uncovering steroidopathy in women with autism: a latent class analysis. Mol Autism. 2014;5:1.

    Article  Google Scholar 

  86. Griffiths S, Allison C, Kenny R, Holt R, Smith P, Baron-Cohen S. The vulnerability experiences quotient (VEQ): a study of vulnerability, mental health and life satisfaction in autistic adults. Autism Res. 2019;12:1516–28.

    Article  PubMed  PubMed Central  Google Scholar 

  87. Rigles B. The relationship between adverse childhood events, resiliency and health among children with autism. J Autism Dev Disord. 2017;47:187–202.

    Article  PubMed  Google Scholar 

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We are grateful to Paula Smith and Rosemary Holt for assistance with advertisement, Alex Tsompanidis for advice on survey development, and Varun Warrier for helpful input in developing our analysis plan. Thanks also to all our participants, as well as the Cambridge Autism Research Database, Autistica’s Discover Network, and various autism support groups and charities for assisting our recruitment.


Funding for this project was generously provided by the Autism Research Trust (Grant Number: RG72423), the Rosetrees Trust (Grant Number: G102199), and the Cambridge and Peterborough NHS Foundation Trust (Grant Number: G102307). EW is supported by funding from the Corbin Charitable Trust. KKO is supported by the Medical Research Council (Unit program: MC_UU_12015/2). SBC received funding from the Wellcome Trust 214322\Z\18\Z. For the purpose of Open Access, the author has applied a CC BY public copyright license to any Author Accepted Manuscript version arising from this submission. Further to this SBC received funding from Innovative Medicines Initiative 2 Joint Undertaking (JU) under grant agreement no 777394. The JU receives support from the European Union’s Horizon 2020 research and innovation program and EFPIA and AUTISM SPEAKS, Autistica, SFARI. SBC and CA also received funding from the Autism Research Trust, Autistica, the MRC and the NIHR Cambridge Biomedical Research Centre. The research was supported by the National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care East of England at Cambridgeshire and Peterborough NHS Foundation Trust. The views expressed are those of the author(s) and not necessarily those of the NHS, NIHR, or Department of Health and Social Care.

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EW performed the literature search, data collection, and analysis. EW also contributed to the study design, data interpretation, writing, and editing of the original manuscript. SBC contributed to the study design, data collection, and editing of the manuscript. CA contributed to the study design, data collection, and editing of the manuscript. KKO contributed to the data analysis plan and data interpretation; he also edited the manuscript. EW, SBC, and CA have all accessed and verified the underlying data. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Elizabeth Weir or Simon Baron-Cohen.

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This study was approved by the University of Cambridge Human Biology Research Ethics Committee (HBREC.2017.28). Written, online informed consent was obtained from all subjects.

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The authors declare that they have no competing interests.

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Weir, E., Allison, C., Ong, K.K. et al. An investigation of the diet, exercise, sleep, BMI, and health outcomes of autistic adults. Molecular Autism 12, 31 (2021).

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