Findings

What do systematic reviews say?

6 questions · 6 findings · 2 reviews

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 1 · 16.7%Moderate 2 · 33.3%High 3 · 50%

Closest answers

The findings closest to your search, judged one by one by TypeSafe's Jev model.

Direct match · question page
- Combined programmes vs usual curricula · Marijuana use < 12 months Subjective
  Universal school‐based prevention for illicit drug use 2014 · Cochrane Headline outcomes only
  RR 0.79 [0.59, 1.05]
  3 studies · 8701 participants
  Moderate
Direct match · question page
- Combined programmes vs usual curricula · Any drugs use < 12 months Subjective
  Universal school‐based prevention for illicit drug use 2014 · Cochrane Headline outcomes only
  RR 0.76 [0.64, 0.89]
  1 study · 6362 participants
  High
Direct match · question page
- Combined programmes vs usual curricula · Marijuana use ≥12 months Subjective
  Universal school‐based prevention for illicit drug use 2014 · Cochrane Headline outcomes only
  RR 0.83 [0.69, 0.99]
  6 studies · 26910 participants
  Moderate
Direct match · question page
- Combined programmes vs usual curricula · Hard drugs use ≥12 months Subjective
  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
Direct match · question page
- Combined programmes vs usual curricula · Hard drug use < 12 months Subjective
  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

Combined programmes vs usual curricula

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

Combined programmes vs usual curricula

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

Combined programmes vs usual curricula

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

Combined programmes leads to lower any 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 0.76 [0.64, 0.89]
1 study · 6362 participants
High

Combined programmes vs usual curricula

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

Combined programmes 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 0.79 [0.59, 1.05]
3 studies · 8701 participants
Moderate

Combined programmes vs usual curricula

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

Combined programmes probably leads to lower 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 0.83 [0.69, 0.99]
6 studies · 26910 participants
Moderate

Combined OST and high NSP vs no OST and low/no NSP

HCV incidence adjusted analyses number of HCV seroconversion · people who inject drugs

Combined OST and high NSP may leads to lower HCV incidence adjusted analyses number of HCV seroconversions compared with no OST and low/no NSP (low certainty).

1 finding from 1 review

Needle syringe programmes and opioid substitution therapy for preventing hepatitis C transmission in people who inject… 2017 · Cochrane Headline outcomes only
RR 0.26 [0.07, 0.89]
3 studies · 3241 participants
Low