Table 2.
SDQ mean scores for siblings of children with ID and without ID (results weighted)
| SDQ score | Non ID mean (SE) | ID mean (SE) | ID mean difference [95% CI] | t | p | Cohen’s d |
|---|---|---|---|---|---|---|
| Total behavior problems | 7.48 (0.10) | 8.98 (0.49) | −1.50 [−2.50, −0.51] | −2.97 | 0.003 | 0.19 |
| Peer problems | 1.42 (0.03) | 2.01 (0.15) | −0.59 [−0.89, −0.29] | −3.85 | <0.001 | 0.26 |
| Conduct problems | 1.54 (0.03) | 2.03 (0.14) | −0.49 [−0.77, −0.21] | −3.46 | 0.001 | 0.22 |
| Emotional symptoms | 1.79 (0.03) | 1.93 (0.19) | −0.14 [−0.53, 0.25] | −0.68 | 0.495 | 0.05 |
| Hyperactivity/inattention | 2.77 (0.04) | 3.05 (0.17) | −0.29 [−0.63, 0.06] | −1.65 | 0.101 | 0.09 |
| Prosocial | 8.49 (0.02) | 8.31 (0.12) | +0.18 [−0.06, 0.43] | 1.48 | 0.139 | 0.09 |
df for each test = 1, 389