Findings

What do systematic reviews say?

2 questions · 2 findings · 1 reviews

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 2 · 100%High 0 · 0%

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

Social influence 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 0.88 [0.72, 1.07]
3 studies · 10716 participants
Moderate

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

Social influence 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 0.95 [0.81, 1.13]
1 study · 5862 participants
Moderate