Association of sleep time in supine position with apnea-hypopnea index as evidenced by successive polysomnography

Purpose The purpose of this study is to evaluate the impact of body position during sleep on apnea-hypopnea index (AHI) and night-to-night variability in polysomnography (PSG) parameters. Methods Totally, 30 patients with obstructive sleep apnea syndrome (OSAS) were assessed prospectively with succe...

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Bibliographic Details
Published in:Sleep & breathing 2017-05, Vol.21 (2), p.289-294
Main Authors: Yalciner, Gokhan, Babademez, Mehmet Ali, Gul, Fatih
Format: Article
Language:English
Subjects:
Adult
Dentistry
Female
Humans
Internal Medicine
Male
Medical screening
Medicine
Medicine & Public Health
Middle Aged
Neurology
Otorhinolaryngology
Pediatrics
Pneumology/Respiratory System
Polysomnography
Posture
Prospective Studies
Sleep apnea
Sleep Apnea, Obstructive - diagnosis
Sleep Apnea, Obstructive - therapy
Sleep Breathing Physiology and Disorders • Original Article
Snoring - diagnosis
Snoring - therapy
Statistics as Topic
Supine Position
Time Factors
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Summary:Purpose The purpose of this study is to evaluate the impact of body position during sleep on apnea-hypopnea index (AHI) and night-to-night variability in polysomnography (PSG) parameters. Methods Totally, 30 patients with obstructive sleep apnea syndrome (OSAS) were assessed prospectively with successive PSGs performed. The patients were categorized as increased (group A), decreased (group B), and unchanged (group C) AHI between the first and second PSG evaluations performed at least 1-week interval. Results The mean AHI values were significantly higher in the second night ( p  = 0.02). A change in AHI was found in almost 85 % of the patients between two successive measurements. According to multivariate and correlation analyses and differences in total AHI in supine position ( r  = 0.897), it was found that the influence of the supine position was the primary factor contributing to the night-to-night variability. Supine AHI, non-supine AHI, and non-supine time findings did not add any significance on total AHI. Conclusions The variability observed in the AHI seems related to amount of sleeping time spent in supine position, suggesting that mean AHI alone is not that reliable in the accurate diagnosis of OSAS severity. A thorough evaluation of AHI in supine and non-supine positions is needed in order to understand better the severity of OSAS.
ISSN:1520-9512
1522-1709
DOI:10.1007/s11325-016-1401-5