Two-way analyses of variance of COMT and DAT1 genes and the hyperactivity/inattention scores from the Strengths and Difficulties Questionnaire according to sex
| Sex | Age, yr | Category | df | F | p value |
|---|---|---|---|---|---|
| Male | 11 | COMT | 2 | 0.852 | 0.43 |
| DAT1 | 2 | 0.385 | 0.68 | ||
| COMT × DAT1 | 4 | 1.072 | 0.37 | ||
| Error | 1931 | — | — | ||
| 15 | COMT | 2 | 3.166 | 0.042 | |
| DAT1 | 2 | 2.270 | 0.10 | ||
| COMT × DAT1 | 4 | 1.086 | 0.36 | ||
| Error | 1934 | — | — | ||
| Female | 11 | COMT | 2 | 0.076 | 0.93 |
| DAT1 | 2 | 0.763 | 0.47 | ||
| COMT × DAT1 | 4 | 0.181 | 0.95 | ||
| Error | 2026 | — | — | ||
| 15 | COMT | 2 | 1.479 | 0.23 | |
| DAT1 | 2 | 1.010 | 0.36 | ||
| COMT × DAT1 | 4 | 0.413 | 0.80 | ||
| Error | 2027 | — | — |
df = degrees of freedom; SDQ = Strengths and Difficulties Questionnaire.