What do systematic reviews say?

Dialectic behaviour therapy with case management vs a health promotion scheme

It is very uncertain whether dialectic behaviour therapy with case management changes number not using marijuana at 6 months compared with a health promotion scheme (very low certainty).

• Interventions for female drug‐using offenders 2019 · Cochrane Headline outcomes only
  RR 1.23 [0.95, 1.59]
  1 study · 116 participants
  Very low