Table 1

Sample Characteristics

Number of genotyped families
607

Total number of genotyped people
2337

Number of genotyped parents
1157

Number of genotyped offspring
1180

Number of offspring per family

1
124
2
402
3
72
4
9

Gender of offspring:

     Male
793 (67.2%)
     Female
387 (32.8%)

Average age of offspring (Standard Deviation)
10.9 (3.0)

Number of affected offspring
603

Origin:

     Northern Europe
882
     Spain
99
     Israel
199

Note: Diagnosis was restricted to children (ADHD combined type) and not systematically attempted with parents.

Oades et al. Behavioral and Brain Functions 2008 4:48   doi:10.1186/1744-9081-4-48

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