Comparison 1. E‐health interventions vs any comparator.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Depression postintervention	5	441	Std. Mean Difference (IV, Random, 95% CI)	‐0.06 [‐0.35, 0.23]
2 Depression 3‐ to 6‐month follow‐up	3	339	Std. Mean Difference (IV, Random, 95% CI)	0.04 [‐0.18, 0.25]
3 Anxiety postintervention	2	324	Std. Mean Difference (IV, Random, 95% CI)	‐0.07 [‐0.29, 0.14]
4 Anxiety 3‐ to 6‐month follow‐up	2	319	Std. Mean Difference (IV, Random, 95% CI)	0.02 [‐0.20, 0.24]
5 Treatment acceptability postintervention	2	304	Std. Mean Difference (IV, Random, 95% CI)	0.46 [0.23, 0.69]
6 Quality of life postintervention	1	34	Mean Difference (IV, Random, 95% CI)	‐0.30 [‐0.54, ‐0.06]
7 Quality of life 3‐ to 6‐month follow‐up	1	22	Mean Difference (IV, Random, 95% CI)	0.10 [‐0.19, 0.39]
8 Functioning postintervention	3	368	Std. Mean Difference (IV, Random, 95% CI)	‐0.08 [‐0.33, 0.18]
9 Functioning 3‐ to 6‐month follow‐up	2	319	Std. Mean Difference (IV, Random, 95% CI)	‐0.13 [‐0.35, 0.09]
10 Status of long‐term physical condition postintervention	5	463	Std. Mean Difference (IV, Random, 95% CI)	0.06 [‐0.12, 0.24]
11 Status of long‐term physical condition 3‐ to 6‐month follow‐up	3	340	Std. Mean Difference (IV, Random, 95% CI)	0.10 [‐0.11, 0.32]