Comparison 4. Promotion/universal prevention interventions versus control group in preventing mental disorders in children.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
4.1 Quality of life at 0‐1 months	2	803	Std. Mean Difference (IV, Random, 95% CI)	‐0.25 [‐0.39, ‐0.11]
4.2 Adverse events at 0‐1 months	1	694	Risk Ratio (M‐H, Random, 95% CI)	Not estimable
4.3 Psychological functioning and impairment at 0‐1 months	2	212	Std. Mean Difference (IV, Random, 95% CI)	0.04 [‐0.90, 0.98]
4.4 Psychological functioning and impairment at 1‐6 months	1	90	Mean Difference (IV, Random, 95% CI)	‐0.29 [‐0.93, 0.35]
4.5 Psychological functioning and impairment at 7‐24 months	1	183	Mean Difference (IV, Random, 95% CI)	‐3.33 [‐5.03, ‐1.63]
4.6 Depressive symptoms at 0‐1 months	1	160	Mean Difference (IV, Random, 95% CI)	‐3.04 [‐6.00, ‐0.08]
4.7 Depressive symptoms at 1‐6 months	3	385	Std. Mean Difference (IV, Random, 95% CI)	‐0.00 [‐0.20, 0.20]
4.8 Anxiety symptoms at 0‐1 months	1	183	Mean Difference (IV, Random, 95% CI)	‐2.27 [‐3.13, ‐1.41]
4.9 Anxiety symptoms at 1‐6 months	1	125	Mean Difference (IV, Random, 95% CI)	‐0.13 [‐0.41, 0.15]
4.10 Anxiety symptoms at 7‐24 months	1	183	Mean Difference (IV, Random, 95% CI)	‐2.27 [‐3.10, ‐1.44]
4.11 Distress/PTSD symptoms at 0‐1 months	2	800	Std. Mean Difference (IV, Random, 95% CI)	‐0.83 [‐2.48, 0.82]
4.12 Distress/PTSD symptoms at 1‐6 months	1	106	Mean Difference (IV, Random, 95% CI)	‐4.51 [‐5.86, ‐3.16]
4.13 Social outcomes at 0‐1 months	3	321	Std. Mean Difference (IV, Random, 95% CI)	‐0.32 [‐0.76, 0.12]
4.14 Social outcomes at 1‐6 months	2	215	Std. Mean Difference (IV, Random, 95% CI)	‐0.27 [‐0.82, 0.28]
4.15 Social outcomes at 7‐24 months	1	183	Mean Difference (IV, Random, 95% CI)	‐0.70 [‐1.07, ‐0.33]