Connection Between Body Position During Sleep and Findings from Full-Night Polysomnography in Patients with Obstructive Sleep Apnea.

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Summary

Patients with obstructive sleep apnea experience significantly more apnea events when sleeping on their back (AHI = 39.1) compared to side positions, suggesting positional therapy could be a practical intervention for reducing OSA severity. Lighting and environmental design in bedrooms or clinical settings could potentially be used to encourage side-sleeping positions as a low-cost adjunct to OSA management.

Key Findings

Patients spent the most time sleeping on their back (189.9±118.4 min) compared to left (113.3±90.9 min) or right side (80.6±90.6 min).
AHI was highest in the supine (back) position (AHI = 39.1±31.9) compared to left (23.8±25.2) or right side (18.5±25.6) in diagnosed OSA patients.
Negative correlation found between AHI and sleep time on the right side (r=-0.178, P=0.005), suggesting right-side sleeping is associated with fewer apnea events.
OSA patients had significantly higher BMI (29.5±4.6 vs. 25.3±4.1 kg/m², P<0.001) and neck circumference (42.0±4.4 vs. 37.4±3.9 cm, P<0.001) compared to non-OSA patients.
Men had higher ESS scores (7.6±4.7) than women (6.3±4.8, P=0.021), indicating greater excessive daytime sleepiness.