| Domains Pertaining to Strength of Evidence | Magnitude of Effect | Strength of Evidence | ||||
|---|---|---|---|---|---|---|
| Number of Studies; Number of Subjects | Risk of Bias; Design | Consistency | Directness | Precision | Summary Effect Size (95% CI) | High, Moderate, Low, Insufficient |
| PTSD Symptom Reduction: mean change from baseline to end of treatment | ||||||
| 1; 21 | Medium; RCTs | NA, single study | Direct | Imprecise | WMD −27.7 | Insufficient |
| Prevention/reduction of comorbid depression: mean change from baseline to end of treatment in BDI | ||||||
| 1; 21 | Medium; RCTs | NA, single study | Direct | Imprecise | Findings favor MCT, p<0.05 | Insufficient |
| Prevention/reduction of comorbid anxiety: mean change from baseline to end of treatment in BAI | ||||||
| 1; 21 | Medium; RCTs | NA, single study | Direct | Imprecise | Findings favor MCT, p<0.05 | Insufficient |
BAI = Beck Anxiety Inventory; CI = confidence interval; NA = not applicable; NNT = number needed to treat; RCT = randomized controlled trial; RD = risk difference; WL = waitlist.
From: Appendix I, Strength of Evidence
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