Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Proportion of people who developed PTSD
RCT	22 people with PTSD symptoms and sleep-initiation difficulties a mean 14 days after a road traffic accident, industrial accident, or non-sexual assault, seven with acute stress disorder	Proportion of people with PTSD (assessed by Structured Clinical Interview using DSM-IV criteria for PTSD) 6 weeks 6/11 (54%) with temazepam (30 mg daily for 5 days followed by 15 mg daily for 2 days) 3/11 (27%) with placebo	P value not reported The RCT is likely to have been underpowered to detect clinically important differences in outcomes