Comparison 1. Light therapy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Total nocturnal sleep time (minutes)	3		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.2 Sleep efficiency	5		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.3 Total wake time at night (minutes)	2		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.4 Number of nocturnal awakenings	3		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.5 Sleep onset latency	2		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.6 Sleep quality	2		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.6.1 Pittsburgh Sleep Quality Index	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.6.2 Sleep Disorders Inventory	1		Mean Difference (IV, Random, 95% CI)	Totals not selected