Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Proportion of people with PTSD
Systematic review	747 people 2 RCTs in this analysis	Proportion of people fulfilling diagnostic criteria for PTSD 281/367 (77%) with sertraline 318/380 (84%) with placebo	RR 0.91 95% CI 0.85 to 0.98	Small effect size	sertraline