Table 2

Characteristics of the study groups

ControlASD in totalLow-functioning ASDHigh-functioning ASD
n total (%)2 672 18527 1226240 (23.01)20 882 (76.99)
Females n (%)840 962 (31.47)8429 (31.08)2032 (32.56)6397 (30.63)
Males n (%)1 831 223 (68.53)18 693 (68.92)4208 (67.44)14 485 (69.37)
Age at first registered diagnosis, years:
mean (s.d.) median
N/A19.83 (14.54)16.49 (13.83)20.83 (14.59)
1217
  • ASD, autism spectrum disorder.