Comparison 16. Sensitivity analysis: attrition bias.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 PTSD diagnosis	7		Odds Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 Low risk	2	320	Odds Ratio (M‐H, Random, 95% CI)	0.27 [0.11, 0.65]
1.2 Unclear risk	3	329	Odds Ratio (M‐H, Random, 95% CI)	0.79 [0.45, 1.38]
1.3 High risk	2	547	Odds Ratio (M‐H, Random, 95% CI)	0.32 [0.06, 1.60]
2 PTSD total symptoms	21		Std. Mean Difference (IV, Random, 95% CI)	Subtotals only
2.1 Low risk	7	1410	Std. Mean Difference (IV, Random, 95% CI)	‐0.38 [‐0.75, ‐0.01]
2.2 Unclear risk	9	1046	Std. Mean Difference (IV, Random, 95% CI)	‐0.36 [‐0.67, ‐0.05]
2.3 High risk	5	831	Std. Mean Difference (IV, Random, 95% CI)	‐0.30 [‐0.53, ‐0.06]