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Table 1 Sample Characteristics

From: The influence of serotonin- and other genes on impulsive behavioral aggression and cognitive impulsivity in children with attention-deficit/hyperactivity disorder (ADHD): Findings from a family-based association test (FBAT) analysis

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