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. 2018 Dec 14;2018(12):CD011710. doi: 10.1002/14651858.CD011710.pub2

Comparison 1. Internet‐based cognitive and behavioural therapy (I‐C/BT) versus wait list (WL).

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1.1 Severity of PTSD symptoms (post‐treatment) 8 560 Std. Mean Difference (IV, Random, 95% CI) ‐0.60 [‐0.97, ‐0.24]
1.2 Severity of PTSD symptoms (follow‐up < 6 months) 3 146 Std. Mean Difference (IV, Random, 95% CI) ‐0.43 [‐1.41, 0.56]
1.3 Dropouts 8 585 Risk Ratio (M‐H, Fixed, 95% CI) 1.39 [1.03, 1.88]
1.4 Diagnosis of PTSD after treatment 1 62 Risk Ratio (M‐H, Fixed, 95% CI) 0.53 [0.28, 1.00]
1.5 Severity of depression (post‐treatment) 5 425 Std. Mean Difference (IV, Random, 95% CI) ‐0.61 [‐1.17, ‐0.05]
1.6 Severity of depression (follow‐up < 6 months) 1 42 Mean Difference (IV, Fixed, 95% CI) ‐8.95 [‐15.57, ‐2.33]
1.7 Severity of anxiety symptoms (post‐treatment) 4 305 Std. Mean Difference (IV, Random, 95% CI) ‐0.67 [‐0.98, ‐0.36]
1.8 Severity of anxiety symptoms (follow‐up < 6 months) 1 42 Mean Difference (IV, Fixed, 95% CI) ‐12.59 [‐20.74, ‐4.44]
1.9 Quality of Life (post‐treatment) 2 221 Std. Mean Difference (IV, Random, 95% CI) 0.60 [0.08, 1.12]