Comparison 1. PROBLEM SOLVING vs ROUTINE CARE.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mental state: did not have at least one problem solving ability improvement (staff rated)	1	12	Risk Ratio (M‐H, Random, 95% CI)	0.2 [0.03, 1.24]
2 Behaviour: 1. Did not show at least one improvement in agressive behaviour (staff rated)	1	12	Risk Ratio (M‐H, Random, 95% CI)	0.09 [0.01, 1.35]
3 Behaviour: 2. Mean number of seclusion hours (no SD)			Other data	No numeric data
4 Social skill: 1. Did not have at least one improved interaction with staff (staff rated)	1	12	Risk Ratio (M‐H, Random, 95% CI)	0.09 [0.01, 1.35]
5 Social skill: 2. Did not have at least one improved interaction with peers (staff rated)	1	12	Risk Ratio (M‐H, Random, 95% CI)	0.54 [0.25, 1.16]
6 Leaving the study early	1	12	Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]