Family and parenting interventions (FPI) v usual care or no intervention (control) for youths with conduct disorder or delinquency*

Weighted event rates
Outcomes at 6 months to 3 yearsFPIControlRRR (95% CI)NNT (CI)
Subsequent arrest44%65%34% (2 to 56)5 (3 to 50)
ComparisonMean difference (CI)
*Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. †Weighted mean difference in days. ‡Standardised mean difference in delinquency scores.
Time in institutions†FPI v control−51 (−73 to −30)
Self reported delinquency‡FPI v control−0.4 (−0.7 to −0.2)