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Demographic characteristics of 288 children and adolescents from 141 extended pedigrees clustering ADHD
| Unaffected (n = 94) Frequency (%) |
Affected (n = 194) Frequency (%) |
Statistic index Chi-square |
P value | Effect size | |
|---|---|---|---|---|---|
| Gender | |||||
| Male | 42 (14.58) | 150 (52.08) | 30.35 | < 0.00001 | – |
| Female | 52 (18.06) | 44 (15.28) | |||
| Mean (SD) | Mean (SD) | Mann–Whitney U | |||
|---|---|---|---|---|---|
| Age | 11.47 (3.03) | 9.63 (2.74) | 5,964 | < 0.0001 | 0.637 |
| School grade | 5.65 (3.04) | 3.98 (2.61) | 6,174.5 | < 0.0001 | 0.589 |
