Association results for the ADHD cases and control samples.

Analyses are presented for both the allelic regression and the genotypic regression for which the genotypes were recoded under an additive genotypic model; age, sex and country/study were used as covariates. The Norwegian (NO) sample consists of 466 cases and 515 controls; the German (GE) sample consists of 500 cases and 1300 controls. The 12 markers that were typed or extracted in the 2 samples are presented (966 cases and 1815 controls); see Tables S6 and S7 for results from all markers in each sample. *indicates significant P-values (<0.05).