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This systematic review identified 35 reports, of which nine independent, non-treatment-selected samples (N = 1,389) contributed to a Bayesian random-effects meta-analysis. Categorical and continuous PTSD outcomes were harmonized using a latent-threshold framework. The pooled latent-z estimate was \u22120.50 (95% credible interval [\u22121.08, 0.09]), corresponding to a threshold-equivalent PTSD prevalence of 30.9% (95% CrI [14.1%, 53.6%]), with substantial between-study heterogeneity (\u03c4 = 0.82, 95% CrI [0.52, 1.42]). Sensitivity and leave-one-out analyses generally supported the primary findings, although uncertainty remained substantial in the risk-of-bias sensitivity analysis. 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