Table 4. Tetrachoric correlations among 127610 sibling pairs born in Sweden 1991–1995.
ADHD only (no stimulants) | ADHD+ stimulants | Stimulants only | |
---|---|---|---|
ADHD only (no stimulants) | 0.34 (0.04) | 0.23 (0.04) | 0.12 (0.05) |
ADHD+stimulants | 0.47 (0.02) | 0.26 (0.04) | |
Stimulants only | 0.46 (0.03) |
ADHD, Attention-deficit/hyperactivity disorder.
Standard error given in parentheses.