Comparison 17. Sensitivity analysis: selection 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	4	516	Odds Ratio (M‐H, Random, 95% CI)	0.46 [0.18, 1.15]
1.2 Unclear risk	2	547	Odds Ratio (M‐H, Random, 95% CI)	0.32 [0.06, 1.60]
1.3 High risk	1	133	Odds Ratio (M‐H, Random, 95% CI)	0.65 [0.32, 1.33]
2 PTSD total symptoms	21		Std. Mean Difference (IV, Random, 95% CI)	Subtotals only
2.1 Low risk	8	874	Std. Mean Difference (IV, Random, 95% CI)	‐0.57 [‐0.97, ‐0.17]
2.2 Unclear risk	13	2413	Std. Mean Difference (IV, Random, 95% CI)	‐0.22 [‐0.39, ‐0.06]