Comparison 11. Email compared to standard methods of communication: Secondary outcomes, patient outcome, effect on patient‐professional communication.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Communicating nonurgent messages to doctor and/or nurse rated as excellent/very good	1	278	Odds Ratio (M‐H, Fixed, 95% CI)	2.63 [1.61, 4.29]
2 Communicating nonurgent messages to doctor and/or nurse rated as poor	1	278	Odds Ratio (M‐H, Fixed, 95% CI)	0.56 [0.25, 1.23]
3 How effective was the communication with your surgeon prior to surgery? (Scale 1‐7)			Other data	No numeric data
4 How effective was the communication with your surgeon after surgery? (Scale 1‐7)			Other data	No numeric data
5 Overall, how effective was the communication with your surgeon? (Scale 1‐7)			Other data	No numeric data