The presence of full categorical attention-deficit/hyperactivity disorder diagnosis at 18 years of age according to the presence of both COMT158Val and DAT1 10R alleles according to sex
| Sex | Genotype | With ADHD | Without ADHD | χ2 | p value | OR (95% CI) |
|---|---|---|---|---|---|---|
| Male | COMT158Val/DAT1 10R carriers | 45 | 1319 | 4.561 | 0.033 | 2.473 (1.048–5.838) |
| Others | 6 | 435 | — | — | — | |
| Female | COMT158Val/DAT1 10R carriers | 62 | 1407 | 0.008 | 0.93 | 0.978 (0.590–1.622) |
| Others | 21 | 466 | — | — | — |
ADHD = attention-deficit/hyperactivity disorder; CI = confidence interval; OR = odds ratio.