Table 1.
Number of children in the normative sample by gender and grade
| Grade |
SDQ parent ratings (n = 24,519) |
SDQ teacher ratings (n = 7,977) |
||||||
|---|---|---|---|---|---|---|---|---|
| Boys | % | Girls | % | Boys | % | Girls | % | |
| 1 |
1,792 |
14.4 |
1,633 |
13.6 |
526 |
13.1 |
519 |
13.1 |
| 2 |
1,662 |
13.3 |
1,514 |
12.6 |
547 |
13.6 |
540 |
13.6 |
| 3 |
1,526 |
12.2 |
1,541 |
12.8 |
481 |
12.0 |
485 |
12.2 |
| 4 |
1,479 |
11.9 |
1,506 |
12.5 |
509 |
12.7 |
506 |
12.8 |
| 5 |
1,562 |
12.5 |
1,382 |
11.5 |
499 |
12.4 |
478 |
12.0 |
| 6 |
1,321 |
10.6 |
1,334 |
11.1 |
484 |
12.1 |
486 |
12.3 |
| 7 |
1,162 |
9.3 |
1,186 |
9.8 |
346 |
8.6 |
343 |
8.6 |
| 8 |
1,100 |
8.8 |
1,136 |
9.4 |
316 |
7.9 |
307 |
7.7 |
| 9 |
868 |
7.0 |
815 |
6.8 |
302 |
7.5 |
303 |
7.6 |
| Total | 12,472 | 12,047 | 4,010 | 3,967 | ||||
Note. SDQ, strengths and difficulties questionnaire. Most grade 1 participants were 7 years old at the time of the survey.