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Table 1 LEAP twin sample characteristics (N = 106)

From: EU-AIMS Longitudinal European Autism Project (LEAP): the autism twin cohort

 

Twin-pairs concordant for ASD

n = 10

Twin-pairs discordant for ASD

n = 28

Twin-pairs with typical development

n = 15

Sex % males

80.0

62.5

46.7

Age (in years)

 Mean (SD)

15.3 (3.4)

15.8 (4.4)

16.8 (2.8)

Ethnicity %

Caucasian = 100

Caucasian = 88.9

Black = 3.7%

Mixed = 7.4%

Caucasian = 100

Maternal education % > high school exam

30.0

48.1

53.8

Paternal education % > high school exam

44.4

41.2

46.2

Annual household income median €

34,000–45,000

45,000–68,000

68,000–90,000