Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Intrusion/avoidance symptoms
RCT	25 people	Mean reduction in intrusive symptom score (change from baseline) 5 weeks 11.0 with Internet-based psychotherapy 3.6 with waiting list control	P <0.04	Effect size not calculated	Internet-based psychotherapy
RCT	25 people	Mean reduction in avoidance symptom score (change from baseline) 5 weeks 9.6 with Internet-based psychotherapy 2.9 with waiting list control	P <0.03	Effect size not calculated	Internet-based psychotherapy