Findings

What do systematic reviews say?

2 questions · 2 findings · 1 reviews · Drugs and Alcohol

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 1 · 50%High 1 · 50%

Marijuana use < 12 months Subjective · primary or secondary school pupils

Social competence showed no clear difference in marijuana use < 12 months Subjective compared with usual curricula (moderate certainty).

1 finding from 1 review

Universal school‐based prevention for illicit drug use 2014 · Cochrane Headline outcomes only
RR 0.9 [0.81, 1.01]
4 studies · 9456 participants
Moderate

Marijuana use ≥ 12 months Subjective · primary or secondary school pupils

Social competence showed no clear difference in marijuana use ≥ 12 months Subjective compared with usual curricula (high certainty).

1 finding from 1 review

Universal school‐based prevention for illicit drug use 2014 · Cochrane Headline outcomes only
RR 0.86 [0.74, 1]
1 study · 2678 participants
High