From: Effectiveness of school-based preventive interventions on adolescent alcohol use: a meta-analysis of randomized controlled trials
Studies reporting categorical measures
k
N
OR ¯
95% CI
Q
df
I 2
Weekly drinking
6
10140
0.86***
0.78-0.95
3.71
5
0.00%
Monthly drinking
11544
0.92
0.75-1.12
22.05***
77.33%
Lifetime drinking
7
11725
1.04
0.93-1.17
11.02
45.53%