Table 1.
Baseline characteristics and differences at T0 and at T1.
| Variable | Total (N=2493) | Intervention (n=1538) | Control (n=955) | Baseline difference (T0) | Follow-up difference (T1) | ||||||
|
|
|
|
|
t 2492 | χ 2 1 | P | t 954 | χ 2 1 | P | ||
| Age (15-19 years), mean (SD) | 16.3 (1.2) | 16.0 (1.1) | 16.7 (1.2) | 15.08 |
|
<.001 | 1.78 |
|
.08 | ||
| Gender, n (%) |
|
|
|
|
45.6 | <.001 |
|
16.5 | <.001 | ||
|
|
Male | 1295 (51.95) | 717 (46.62) | 578 (60.5) |
|
|
|
|
|
|
|
|
|
Female | 1198 (48.05) | 821 (53.38) | 377 (39.5) |
|
|
|
|
|
|
|
| Educational level, n (%) |
|
|
|
|
73.4 | <.001 |
|
6.7 | .006 | ||
|
|
High | 1483 (59.49) | 1017 (66.12) | 466 (48.8) |
|
|
|
|
|
|
|
|
|
Low | 1010 (40.51) | 521 (33.88) | 489 (51.2) |
|
|
|
|
|
|
|
| Religion, n (%) |
|
|
|
|
10.0 | .002 |
|
15.4 | <.001 | ||
|
|
No religion | 1465 (58.76) | 866 (56.31) | 599 (62.7) |
|
|
|
|
|
|
|
|
|
Religion | 1028 (41.24) | 672 (43.69) | 356 (37.3) |
|
|
|
|
|
|
|
|
|
|
Catholic | 593 (23.79) | 397 (25.81) | 196 (20.5) |
|
|
|
|
|
|
|
|
|
Protestant | 174 (6.98) | 130 (8.45) | 44 (4.6) |
|
|
|
|
|
|
|
|
|
Muslim | 150 (6.02) | 75 (4.88) | 75 (7.9) |
|
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|
|
|
|
|
|
|
Other | 111 (4.45) | 70 (4.55) | 41 (4.3) |
|
|
|
|
|
|
| Ethnicity, n (%) |
|
|
|
|
1.2 | .27 |
|
0.0 | .51 | ||
|
|
Dutch | 2225 (89.25) | 1381 (89.79) | 844 (88.4) |
|
|
|
|
|
|
|
|
|
Non-Dutch | 268 (10.75) | 157 (10.21) | 111 (11.6) |
|
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|
|
|
|
|
|
|
|
Antillean | 5 (0.20) | 3 (0.20) | 2 (0.2) |
|
|
|
|
|
|
|
|
|
Belgian | 10 (0.40) | 5 (0.33) | 5 (0.5) |
|
|
|
|
|
|
|
|
|
German | 13 (0.52) | 10 (0.65) | 3 (0.3) |
|
|
|
|
|
|
|
|
|
Surinamese | 26 (1.04) | 18 (1.17) | 8 (0.8) |
|
|
|
|
|
|
|
|
|
Moroccan | 35 (1.40) | 15 (0.98) | 20 (2.1) |
|
|
|
|
|
|
|
|
|
Turkish | 48 (1.93) | 21 (1.37) | 27 (2.8) |
|
|
|
|
|
|
|
|
|
Other | 131 (5.25) | 85 (5.53) | 46 (4.8) |
|
|
|
|
|
|
| Alcohol use, n (%) |
|
|
|
|
|
|
|
|
|
||
|
|
Never drinkers | 664 (26.63) | 459 (29.84) | 205 (21.5) |
|
21.2 | <.001 |
|
0.7 | .39 | |
|
|
Binge drinkers | 1271 (50.98) | 724 (47.07) | 547 (57.3) |
|
24.5 | <.001 |
|
3.6 | .06 | |
| Binge drinking occasions, mean (SD) | 2.2 (4.0) | 2.0 (4.2) | 2.4 (3.8) | 2.51 |
|
.01 | 1.18 |
|
.24 | ||
| Weekly alcohol use, mean (SD) | 3.9 (8.8) | 3.2 (8.1) | 5.0 (9.6) | 4.96 |
|
<.001 | 2.17 |
|
.03 | ||