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Table 3 Sample characteristics

From: The EU-AIMS Longitudinal European Autism Project (LEAP): clinical characterisation

  Total Adults Adolescents Children Mild ID
ASD TD/ID ASD TD ASD TD ASD TD ASD ID
Sex N 437 300 142 109 126 94 101 68 68 29
Males (%) 72.3 65 72.5 67 77 69.1 71.3 61.8 64.7 51.7
Females (%) 27.7 35 27.5 33 23 30.9 28.7 38.2 35.3 48.3
Age (in years) M 16.68 17.22 22.79 23.10 14.86 15.33 9.40 9.52 18.09 19.30
SD 5.80 5.94 3.37 3.27 1.73 1.73 1.58 1.54 4.27 4.97
Range 6.08–30.60 6.24 -30.78 18.02–30.60 18.07–30.78 12.07–17.90 12.04–17.99 6.08–11.97 6.24–11.98 11.50–30.19 12.92–30.24
Full-scale IQ M 97.61 104.57 103.99 109.15 101.59 106.58 105.29 111.46 65.84 63.39
SD 19.74 18.26 14.82 12.60 15.68 13.18 14.76 12.69 7.70 8.00
Range 40a–148 50–142 76–148 76–142 75–143 77–140 74–148 76–142 40a–74 50–74
  1. ASD autism spectrum disorder, TD typically developing, Mild ID intellectual disability
  2. aThere are 3 individuals with a full-scale IQ <50