Subgroup | Main effect adjusted OR* | 95% CI | Subgroup × SFP interaction adjusted OR | 95% CI | ||
Lower limit | Upper limit | Lower limit | Upper limit | |||
Currently smoke at least one cigarette a week | 1.95 | 0.83 | 4.55 | 0.35 | 0.11 | 1.10 |
Ever taken cannabis | 2.14 | 0.70 | 6.58 | 0.33 | 0.07 | 1.50 |
Taken cannabis at least once in the last 12 months | 2.11 | 0.79 | 5.68 | 0.25 | 0.06 | 0.99 |
Taken cannabis at least once in the last 30 days | 1.22 | 0.39 | 3.77 | 0.30 | 0.06 | 1.54 |
Subgroup | Adjusted mean difference | 95% CI | Subgroup × SFP interaction adjusted mean difference | 95% CI | ||
Lower limit | Upper limit | Lower limit | Upper limit | |||
Strengths and Difficulties total difficulties score | 1.77 | 0.61 | 2.93 | −2.27 | −3.83 | −0.71 |
*The main effect can be interpreted as the effect of belonging to a family with challenges in a group setting (relative to a family without challenges in a group setting) for those allocated to the control arm.
SDQ, Strengths and Difficulties Questionnaire; SFP, Strengthening Families Programme.