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 0 · 0%High 2 · 100%

Hard drug use < 12 months Subjective · primary or secondary school pupils

Combined programmes showed no clear difference in hard drug 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 0.85 [0.63, 1.14]
1 study · 693 participants
High

Hard drugs use ≥ 12 months Subjective · primary or secondary school pupils

Combined programmes showed no clear difference in hard drugs 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 [0.39, 1.9]
2 studies · 1066 participants
High