In this study the investigators will analyze the influence of smoking, benzodizepine use, and obesity among patients with severe Obstructive Sleep Apnea (sOSA).
This study is a retrospective study. Patients enrolled: all patients with a PSG (polysomnography) between 1st January 2014 and 30th June 2015. First analysis: influence of smoking, benzodiazepine use, and obesity on the AHI (Apnea Hypopnea Index: the number of apnea and hypopnea per hour of sleep). Second analysis: only among patients with sOSA: influence of smoking, benzodiazepine use, and obesity on sleep fragmentation and night oximetry.
Study Type
OBSERVATIONAL
Enrollment
920
Influence of smoking on parameters derived from overnight PSG
Influence of obesity on parameters derived from overnight PSG
Influence of benzodiazepine use on parameters derived from overnight PSG
Apnea Hypopnea Index
Apnea Hypopnea Index (AHI) is defined as the number of apnea and hypopnea per hour of sleep. It is the major determinant of the severity of OSA.
Time frame: 1 day
Sleep fragmentation defined by the percentage of time spent in each of the four stades of sleep (Stade 1, Stade 2, Slow wave sleep and Rapid Eye Movements)
Are smoking and/or obesity a risk factor for sleep fragmentation?
Time frame: 1 day
Time spent under 90% of SpO2 during the night
Are smoking and/or obesity a risk factor for oxygen desaturation (\< 90% SpO2) during the night?
Time frame: 1 day
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