Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Proportion of people with PTSD
Systematic review	51 people Data from 1 RCT	Proportion of people with PTSD 21/36 (58%) with supportive psychotherapy 18/25 (72%) with waiting list control	RR 0.81 95% CI 0.56 to 1.17		Not significant