Table 1.
Characteristics of the study sample by sex (n=3774)
| Characteristics | Boys n= 1873 | Girls n=1901 | p value* | |
|---|---|---|---|---|
| Age in years | ||||
| Median (range) | 9.8 (9.5-10.4) | 9.9 (9.5-10.5) | 0.643 | |
| Ethnicity a (%) | ||||
| Dutch | 1278 (68.2) | 1295 (68.1) | ||
| Other western | 147 (7.8) | 180 (9.4) | ||
| Non-western | 438 (23.4) | 413 (21.7) | 0.135 | |
| Maternal education level a | ||||
| Low | 619 (33.0) | 615 (32.3) | ||
| High | 1143 (61.0) | 1158 (60.9) | 0.782 | |
| Household incomea (%) | ||||
| < 2000 | 321 (17.1) | 298 (15.7) | ||
| 2000-3200 | 552 (29.5) | 535 (28.1) | ||
| > 3200 | 877 (46.8) | 936 (49.2) | 0.230 | |
| IOTN-DHCa (%) | ||||
| 2 | 578 (30.6) | 541 (28.5) | ||
| 3 | 364 (19.4) | 392 (20.6) | ||
| 4 | 428 (22.9) | 443 (23.3) | ||
| 5 | 128 (6.8) | 135 (7.1) | 0.449 | |
| IOTN-aca (%) | ||||
| ≤ 5 | 1045 (55.8) | 1018 (53.5) | ||
| > 5 | 394 (21.0) | 451 (23.7) | 0.049 | |
| OHRQoL | ||||
| Median (range) | 50.0 (43.00-53.00) | 49.0 (42.00-53.00) | < 0.001 | |
| Subjective treatment need (%) | ||||
| No | 565 (30.2) | 484 (25.5) | ||
| Borderline | 498 (26.6) | 460 (24.2) | ||
| Yes | 810 (43.2) | 957 (50.3) | <0.001 | |
*
Based on chi square test for categorical variables and t-test or Mann –Whitney U for continuous variables
a
May not add up to 3774, because of missing values: Maternal education: 6.3 %; Ethnicity : 0.6%; IOTN: 21.9 %; Household income: 6.7%, IOTN-DHC: 20.2%; IOTN-AC: 22.9%