Differences in the sleep structure and accompanying morbidities in obstructive sleep apnea patients with apnea versus hypopnea predominancy
Journal Title: Kocaeli Tıp Dergisi - Year 2017, Vol 6, Issue 3
Abstract
INTRODUCTION: In this study, we aimed to evaluate the body mass index (BMI), epworth sleepiness scale (ESS), accompanying diseases and differences in upper airway morphology and sleep structure in particular in patients with apnea- or hypopnea-predominant obstructive sleep apnea syndrome (OSAS). METHODS: Patients whose hypopnea ratio was more than 50% were taken to the hypopnea group and patients whose apnea ratio was more than 50% were taken to apnea group. BMI, ESS and polysomnography (PSG) parameters of the patients were recorded. Patients were screened for smoking habits, presence of chronic obstructive pulmonary disease (COPD), hypertension (HT), diabetes mellitus (DM), coronary artery disease (CAD) and upper respiratory pathology in their anamnesis. RESULTS: Hypertension rate was found to be significantly higher in hypopnea group than in apnea group (p = 0.021, p <0.05). Hypopnea group was found to have significantly higher Rapid Eye Movement (REM) rate than apnea group (p = 0.016, p <0.05). Apnea-hypopnea index (AHI) of Non-Rapid Eye Movement (NREM) was significantly higher in apnea group than in hypopnea group (p = 0.007; p <0.01). Supine AHI measurements were significantly higher in apnea group (p = 0.047, p <0.05). In terms of uvula, elongated uvula rate was found to be significantly higher in apnea group (p = 0.043; p <0.05). DISCUSSION AND CONCLUSION: Apnea-predominant sleep apnea syndrome is more severe than hypopnea-predominant OSAS. Hypertension is more common in patients with hypopnea-predominant obstructive sleep apnea syndrome
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