Summary of findings 10. Group TFCBT compared with Waitlist/Usual Care for chronic post‐traumatic stress disorder (PTSD) in adults.

Group TFCBT compared with Waitlist/Usual Care for chronic post‐traumatic stress disorder (PTSD)
Patient or population: Adults with PTSD for at least 3 months Settings: Primary care, community, outpatient Intervention: Group TFCBT Comparison: Waitlist/Usual Care/Minimal Contact
Outcomes	Illustrative comparative risks* (95% CI)		Relative effect (95% CI)	No of Participants (studies)	Quality of the evidence (GRADE)	Comments
	Assumed risk	Corresponding risk
		Group TFCBT
Severity of PTSD symptoms ‐ Clinician‐rated		The mean severity of PTSD symptoms ‐ clinician in the intervention groups was 1.28 standard deviations lower (2.25 to 0.31 lower)		185 (3 studies)	⊕⊝⊝⊝ very low1,2,3
Leaving the study early for any reason	Study population		RR 1.21 (0.94 to 1.55)	573 (7 studies)	⊕⊝⊝⊝ very low1,2,3
	262 per 1000	317 per 1000 (246 to 406)
	Moderate
	200 per 1000	242 per 1000 (188 to 310)
*The basis for the assumed risk (e.g. the median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI). CI: Confidence interval; RR: Risk ratio;
GRADE Working Group grades of evidence High quality: Further research is very unlikely to change our confidence in the estimate of effect. Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate. Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate. Very low quality: We are very uncertain about the estimate.

¹Insufficient information to judge risk of bias
 ²Unexplained heterogeneity
 ³Small sample sizes