Patient-predicted sleep position vs. HST data: a tendency to underestimate supine sleep

Area of Science:

• Sleep Medicine
• Respiratory Physiology

Background:

• Body position significantly impacts sleep quality and respiratory events.
• Accurate assessment of sleep position is crucial for diagnosing and managing sleep disorders like obstructive sleep apnea (OSA).

Purpose of the Study:

• To evaluate the accuracy of patient estimations of their supine versus non-supine sleep proportions.
• To compare self-reported sleep positions with objective data from home sleep tests (HST).

Main Methods:

• Patients undergoing OSA evaluation were asked about their perceived sleep position.
• Participants who were confident in their knowledge estimated their supine sleep percentage.
• Estimates were compared against actual sleep position data obtained from a home sleep test (HST).

Main Results:

• Subjects collectively underestimated their supine sleep proportion by 21.6% (p < .001).
• 80% of subjects slept more supine than they estimated during the HST.
• 18% of subjects exhibited a more severe OSA classification based on actual sleep position than their prediction suggested.

Conclusions:

• Patients frequently underestimate their supine sleep duration.
• Underestimation of supine sleep can lead to a misjudgment of OSA severity.
• Sleep physicians should consider this underestimation bias when evaluating patients with positional OSA.