Skip to main content

Table 1 Participant characteristics

From: Plasma anandamide concentrations are lower in children with autism spectrum disorder

Demographics Control children Children with ASD
N 53 59
Female 20 14
Male 33 45
Age 7.13 ± 2.96 8.25 ± 2.67*
Full-scale IQ 115.49 ± 9.51 83.24 ± 28.37*
Full-scale IQ range 92–134 50–140
N cases with IQ < 70 0 17
N cases of psychotropic medication use 0 29
Ethnicity  
 Asian 6 11
 Caucasian 38 35
 Other 9 13
  1. Values in the table are reported as arithmetic means ± standard deviation. The χ2 likelihood ratio was used to examine whether the distribution of individuals in the two groups differed by sex and by ethnicity; no significant effects were found (sex, χ2(1) = 2.60, p = 0.107; ethnicity, χ2(2) = 2.03, p = 0.363). Welch’s unequal variances t test was used to test for differences in age and full-scale IQ between groups (* = p < 0.05). Significant group differences were observed for both measures (age, t(105.4) = 2.09, p = 0.039; IQ, t(72.2) = 8.23, p < 0.0001) and therefore were used as blocking variables in the analysis
  2. Abbreviations: ASD autism spectrum disorder, IQ intelligence quotient