Table 5.
Intervention effectsa on binary secondary outcomes (non-imputed datasetb).
| Outcome after 3 months | WISEteens group (n=715) | Control group (n=734) | Between-group differences | |||||
| % (SE) | P | % (SE) | P | F(df) | P | OR (95% CI) | ||
| Illegal drug use prevalence (%) | ||||||||
|
|
Baseline | 45.0 (0.02) |
|
43.0 (0.02) |
|
|
|
|
|
|
3-months follow-up | 36.1 (0.05) | .025 | 39.5 (0.05) | .431 | 1.03 (1, 133) | .311 | 0.67 (0.31 to 1.45) |
| Polydrugc prevalence (%) | ||||||||
|
|
Baseline | 42.9 (0.02) |
|
40.1 (0.02) |
|
|
|
|
|
|
3-months follow-up | 31.3 (0.05) | .012 | 36.8 (0.05) | .235 | 2.22 (1, 163) | .138 | 0.57 (0.27 to 1.20) |
aBased on (logistic) general linear mixed model with group as fixed factor, follow-up values as outcomes, and baseline scores, country, and parental educational attainment as covariates.
bValid follow-up data for n=211 trial participants.
cCombined use of alcohol and any illegal drug in past 30 days.