Table 2 Number and percentage of children in borderline and clinical range scores of behavioral problems and ADHD symptoms by child sex and maternal cotinine levels at the third trimester (n = 3202)
Number of children | Total difficulties | Hyperactivity/inattention | Conduct problems | ||
|---|---|---|---|---|---|
Child sex | All | 3216 | 649 (20.2) | 480 (14.9) | 628 (19.5) |
Boys | 1621 | 393 (24.2) | 316 (19.5) | 358 (22.1) | |
Girls | 1595 | 256 (16.1) | 164 (10.3) | 270 (16.9) | |
Maternal cotinine levels (ng/ml) | ≦ 0.21 (non) | 1882 | 339 (18.0) | 234 (12.4) | 340 (18.1) |
0.22–0.51 (low passive) | 531 | 112 (21.1) | 97 (18.3) | 107 (20.2) | |
0.52–11.48 (high passive) | 535 | 126 (23.6) | 97 (18.1) | 125 (23.4) | |
11.49 ≧ (active) | 268 | 72 (26.9) | 52 (19.4) | 56 (20.9) |