Comparison 2. Positional therapy versus inactive control.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Epworth Sleepiness Scale	2	187	Mean Difference (IV, Random, 95% CI)	‐1.58 [‐2.89, ‐0.26]
2 Apnoea‐Hypopnoea Index	4	277	Mean Difference (Random, 95% CI)	‐7.38 [‐10.06, ‐4.70]
2.1 Vibration alarm device	3	191	Mean Difference (Random, 95% CI)	‐7.77 [‐10.81, ‐4.74]
2.2 Tennis ball device	1	86	Mean Difference (Random, 95% CI)	‐6.0 [‐11.72, ‐0.28]
3 Adherence as measured by number of participants continuing therapy	1		Odds Ratio (M‐H, Random, 95% CI)	Totals not selected
4 Quality of life: FOSQ	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
5 Cognitive function: measured as motor reaction time	1		Mean Difference (IV, Random, 95% CI)	Totals not selected