The impacts of ambient relative humidity and temperature on supine position-related obstructive sleep apnea in adults

Obstructive sleep apnea (OSA) is associated with seasonal variations. The objective of this study was to examine associations of ambient relative humidity (RH) and temperature on sleep parameters. We conducted a cross-sectional study by retrospectively recruiting 5204 adults from a sleep center in T...

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Bibliographic Details
Published in:Environmental science and pollution research international 2022-07, Vol.29 (33), p.50755-50764
Main Authors: Liu, Wen-Te, Wang, Yuan-Hung, Chang, Li-Te, Wu, Chih-Da, Wu, Dean, Tsai, Cheng-Yu, Lo, Chen-Chen, Lo, Kang, Chung, Kian Fan, Chang, Ta-Yuan, Chuang, Kai-Jen, Lee, Yueh-Lun, Chuang, Hsiao-Chi
Format: Article
Language:English
Subjects:
Adults
Apnea
Aquatic Pollution
Arousal
Atmospheric Protection/Air Quality Control/Air Pollution
cross-sectional studies
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Eye movements
eyes
Humidity
NREM sleep
oxygen
Oxygen content
Parameters
Posture
Regression analysis
Regression models
Relative humidity
REM sleep
Research Article
Seasonal variations
sleep
Sleep and wakefulness
Sleep apnea
Sleep disorders
Supine position
Taiwan
temperature
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Obstructive sleep apnea (OSA) is associated with seasonal variations. The objective of this study was to examine associations of ambient relative humidity (RH) and temperature on sleep parameters. We conducted a cross-sectional study by retrospectively recruiting 5204 adults from a sleep center in Taipei, Taiwan. Associations of 1-night polysomnography with ambient RH and temperature in 1-day, 7-day, 1-month, 6-month, and 1-year averages were examined using linear regression models and a mediation analysis. RH increase was associated with snoring index decrease and apnea/hypopnea index (AHI) increase. Temperature increase was associated with decreases in sleep efficiency and the AHI, and increases in the wake time after sleep onset and snoring index. RH increase was inversely associated with non-rapid eye movement (NREM) sleep stage I (N1), III (N3), and rapid eye movement (REM) sleep, but positively associated with the NREM sleep stage II (N2) stage. Temperature increase was associated with N1, N2, and N3 sleep. An increase in RH was associated with an increase in the arousal index and a decrease in the 
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-022-18922-8