Comparison 6. Anger/conflict response interventions versus no intervention by sex.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Difference in aggression scale score or observed aggression by sex (post test)	18	943	SMD (Random, 95% CI)	‐0.39 [‐0.61, ‐0.16]
1.1 All boys	6	277	SMD (Random, 95% CI)	‐0.08 [‐0.40, 0.24]
1.2 Not all boys	12	666	SMD (Random, 95% CI)	‐0.53 [‐0.81, ‐0.26]
2 Difference in aggression scale score or observed violence by sex (up to 12 months)	2	83	SMD (Random, 95% CI)	‐0.53 [‐0.98, ‐0.08]
2.1 All boys	0	0	SMD (Random, 95% CI)	0.0 [0.0, 0.0]
2.2 Not all boys	2	83	SMD (Random, 95% CI)	‐0.53 [‐0.98, ‐0.08]
3 Difference in school response to aggressive acts + other acts by sex (post test)	5	152	SMD (Random, 95% CI)	0.23 [‐0.19, 0.65]
3.1 All boys	2	146	SMD (Random, 95% CI)	0.23 [‐0.19, 0.65]
3.2 Not all boys	3	6	SMD (Random, 95% CI)	0.0 [0.0, 0.0]
4 Difference in school response to aggressive acts + other acts by sex (up to 12 months)	2	83	SMD (Random, 95% CI)	0.03 [‐0.42, 0.47]
4.1 All boys	0	0	SMD (Random, 95% CI)	0.0 [0.0, 0.0]
4.2 Not all boys	2	83	SMD (Random, 95% CI)	0.03 [‐0.42, 0.47]