Comparison 1. Educational intervention versus control.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 CPAP Device Usage (hours/night)	10	1128	Mean Difference (IV, Random, 95% CI)	0.85 [0.32, 1.39]
2 Machine usage, sensitivity analysis: adherence in control group < four hours/night	6	698	Mean Difference (IV, Random, 95% CI)	0.85 [0.06, 1.64]
3 N deemed adherent (≥ four hours/night)	7	1019	Odds Ratio (M‐H, Random, 95% CI)	2.58 [1.50, 4.44]
4 Withdrawal	9		Odds Ratio (M‐H, Random, 95% CI)	Totals not selected
5 Epworth Sleepiness Scale ‐ Comparison of Values at Endpoint	3		Mean Difference (IV, Random, 95% CI)	Totals not selected