Table 1.
Demographic and Geographic Characteristics of the Adolescents in the Clinical (n = 4,053) and Community (n = 962) Samples.
| Characteristics | Clinical sample, n (%)a | Community sample, n (%)a | Dutch population, % |
|---|---|---|---|
| Gender | |||
| Male | 1,902 (47.6)b | 474 (49.6)c | 49.5 |
| Female | 2,093 (52.4) | 482 (50.4) | 50.5 |
| Age, years | |||
| 12 | 581 (14.3) | 56 (5.9) d | 16.5 |
| 13 | 741 (18.3) | 315 (33.1) | 16.3 |
| 14 | 767 (18.9) | 281 (29.5) | 16.4 |
| 15 | 799 (19.7) | 117 (12.3) | 16.9 |
| 16 | 678 (16.7) | 107 (11.2) | 16.9 |
| 17 | 487 (12.0) | 77 (8.1) | 17.1 |
| Mother’s country of birth | |||
| The Netherlands | e | 754 (83.2)f | 78.6 |
| Other | e | 149 (16.5) | 21.4 |
| Mother’s educational level | |||
| Low | e | 187 (24.9)g | 23.6 |
| Medium | e | 281 (37.5) | 41.7 |
| High | e | 282 (37.6) | 34.7 |
| Geographical region of the Netherlands | |||
| North | 2,565 (63.4)h | 51 (6.9)i | 10.2 |
| East | 1,452 (35.9) | 164 (22.2) | 21.1 |
| South | 4 (0.1) | 155 (20.9) | 21.4 |
| West | 24 (0.6) | 367 (49.9) | 47.3 |
a
Percentages computed of valid cases only. bMissing: n = 58. cMissing: n = 6. dMissing: n = 9. eInformation not available. fMissing: n = 100. gMissing: n = 212. hMissing: n = 10. iMissing: n = 222.