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Table 1 Percentages of childhood diagnoses (from 0 to 17 years of age) among Danish individuals born between 1993 and 1999

From: Childhood diagnoses in individuals identified as autistics in adulthood

  Autism diagnosed in adulthood No autism diagnosis Comparisons
Females
N = 887
%
Males
N = 1312
%
Median age
Females/males
(years)
Females
N = 226,870
%
Males
N = 233,928
%
Median age
Females/males
(years)
OR (adult autism) OR (gender) Interaction
ΔlogOR
ADHD 5.6 11.8 15/11 1.7 3.5 14/11 3.52*** 0.46***  − 0.03
Affective disorders 13.9 5.2 16/16 2.7 0.9 16/15 5.80*** 2.91*** 0.01
Anxiety disorders 8.2 3.5 16/14 1.8 1.0 15/13 4.88*** 1.76*** 0.33
Conduct disorder 1.4 3.6 12.5/10 0.3 0.7 13/10 4.66*** 0.41***  − 0.11
Disorders of scholastic skills 1.4 0.9 15/11.5 0.2 0.4 15/12 5.49*** 0.63*** 0.86*
Disorders of social functioning 3.5 2.9 13/10 0.4 0.6 12/9 8.30*** 0.78*** 0.44
Disorders of speech and language 0.6 2.7 12/7 0.2 0.4 7/6 2.99*** 0.43***  − 0.72
Dissociative and conversion disorders 0.9  < 0.4 15.5/NA 0.2 0.0 15/15 5.68** 4.41*** NA
Eating disorders 5.0 0.8 15/13 1.7 0.2 15/12 3.10*** 7.84***  − 0.24
Epilepsy 2.8 4.0 4/5 1.7 1.7 7/7 1.71*** 0.98  − 0.35
Intellectual disability 3.6 5.0 13/11 0.8 1.0 12/10 4.89*** 0.73***  − 0.01
Migraine 1.5 1.5 15/10.5 1.2 1.0 13/12 1.25 1.22***  − 0.24
Obsessive–compulsive disorder 3.3 1.4 15/10 0.7 0.5 14/13 4.48*** 1.51*** 0.48
Psychotic disorders 3.4 2.5 16/15 0.7 0.4 15/15 5.02*** 1.65***  − 0.20
Selective mutism  < 0.6 0.4 NA/7 0.0 0.0 7/10 31.96*** 2.21** NA
Sleep disorders 0.7 0.7 16.5/8 0.5 0.6 9/6 1.42 0.86*** 0.13
Somatoform disorders 0.9  < 0.4 14/NA 0.3 0.1 14/14 2.99* 3.28*** NA
Stress disorders 16.5 6.9 15/15 4.7 2.0 15/14 4.00*** 2.37*** 0.11
Tic disorders 1.0 2.6 15/11 0.3 0.8 11/10 4.01*** 0.30*** 0.23
Any of the above 38.8 30.7   12.4 10.5   4.50*** 1.20*** 0.17
  1. The first three columns show childhood diagnoses among those diagnosed with autism in adulthood and the median ages at diagnosis. The middle three columns show the same information for those with no record of an autism diagnosis. The last three columns show comparisons of childhood diagnosis between those with and without an adult autism diagnosis and between females and males. Odds ratios (OR) of 1 correspond to null effects, while an OR larger than 1 indicate a higher prevalence of childhood diagnosis in females or those with an adult autism diagnosis, respectively. For the interaction effect, a Δlog(OR) of 0 corresponds to a null effect, while positive values indicate that the sex-related OR is higher in the adult autism group. Significance levels: * = p < 0.05, ** = p < 0.001, *** = p < 0.0001