Comparison 2. Impulsive lifestyle counselling + treatment‐as‐usual versus treatment‐as‐usual alone.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Aggression: scores on Buss‐Perry Aggression Questionnaire (BPAQ) at 3 months	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
2.2 Aggression: scores on Buss‐Perry Aggression Questionnaire (BPAQ) at 9 months	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
2.3 Adverse events: death between 3‐month and 9‐month follow‐up	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
2.4 Adverse events: incarceration during follow‐up period	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
2.5 Leaving the study early: number at 3 months	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
2.6 Leaving the study early: number at 9 months	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected