Table 4. Prevalence of abnormal total and subscale SDQ scores by age.
| 3-year-olds (n=2,087) | 4-year-olds (n=2,795) | 5-year-olds (n=2,694) | 6-year-olds (n=1,324) | |
|---|---|---|---|---|
| Total | 307 (14.4) | 397 (14.2) | 343 (12.7) | 162 (8.5) |
| Emotional symptoms | 180 (8.6) | 245 (8.8) | 266 (9.9) | 113 (8.5) |
| Conduct problems | 324 (15.5) | 412 (14.7) | 336 (12.5) | 165 (12.5) |
| Hyperactivity problems | 401 (19.2) | 564 (20.2) | 494 (18.3) | 220 (16.6) |
| Peer problems | 583 (27.9) | 723 (25.9) | 675 (25.1) | 292 (22.1) |
| Pro-social behavior | 429 (20.6) | 492 (17.6) | 366 (13.6) | 153 (11.6) |
Data presented as n (%).
SDQ = Strengths and Difficulties Questionnaire.