Correlational Analysis of Supine Position Time and Sleep-related Variables in Obstructive Sleep Apnea Syndrome.
10.14401/KASMED.2017.24.1.32
- Author:
Si Young KIM
1
;
Doo Heum PARK
;
Jaehak YU
;
Seung Ho RYU
;
Ji Hyeon HA
Author Information
1. Department of Psychiatry, Konkuk University Hospital, Seoul, Korea. dhpark@kuh.ac.kr
- Publication Type:Original Article
- Keywords:
Heart rate variability;
Obstructive sleep apnea syndrome;
Sleep structure;
Supine position time
- MeSH:
Heart Rate;
Humans;
Linear Models;
Male;
Oxygen;
Sleep Apnea Syndromes;
Sleep Apnea, Obstructive*;
Snoring;
Supine Position*
- From:Sleep Medicine and Psychophysiology
2017;24(1):32-37
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVES: A supine sleep position increases sleep apneas compared to non-supine positions in obstructive sleep apnea syndrome (OSAS). However, supine position time (SPT) is not highly associated with apnea-hypopnea index (AHI) in OSAS. We evaluated the correlation among sleep-related variables and SPT in OSAS. METHODS: A total of 365 men with OSAS were enrolled in this study. We analyzed how SPT was correlated with demographic data, sleep structure-related variables, OSAS-related variables and heart rate variability (HRV). Multiple linear regression analysis was conducted to investigate the factors that affected SPT. RESULTS: SPT had the most significant correlation with total sleep time (TST ; r = 0.443, p < 0.001), followed by sleep efficiency (SE ; r = 0.300, p < 0.001). Snoring time (r = 0.238, p < 0.001), time at < 90% SpO2 (r = 0.188, p < 0.001), apnea-hypopnea index (AHI ; r = 0.180, p = 0.001) and oxygen desaturation index (ODI ; r = 0.149, p = 0.004) were significantly correlated with SPT. Multiple regression analysis revealed that TST (t = 7.781, p < 0.001), snoring time (t = 3.794, p < 0.001), AHI (t = 3.768, p < 0.001) and NN50 count (t = 1.993, p = 0.047) were associated with SPT. CONCLUSION: SPT was more highly associated with sleep structure-related parameters than OSAS-related variables. SPT was correlated with TST, SE, AHI, snoring time and NN50 count. This suggests that SPT is likely to be determined by sleep structure, HRV and the severity of OSAS.
