Comparison 2. Infrared light therapy versus no light therapy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Incidence of SAD (per protocol analysis)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
2 Incidence of SAD (ITT, assuming no dropout was depressed)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
3 Incidence of SAD (ITT, assuming all dropouts were depressed)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
4 Incidence of severe SAD (per protocol analysis)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
5 Incidence of severe SAD (ITT, assuming no dropout was depressed)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
6 Incidence of severe SAD (ITT, assuming all dropouts were depressed)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
7 Overall rate of discontinuation	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected