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Obstructive Sleep Apnea in a Clinical Population: Prevalence, Predictive Factors, and Clinical Characteristics of Patients Referred to a Sleep Center in Mongolia

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  • Shuren Dashzeveg

    (Department of Neurology, School of Medicine, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia
    Sleep Center, General Hospital for State Special Servants, Ulaanbaatar 15160, Mongolia)

  • Yasunori Oka

    (Center for Sleep Medicine, Ehime University Hospital, Shitsukawa, Toon 791-0295, Ehime, Japan)

  • Munkhjin Purevtogtokh

    (School of Medicine, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia)

  • Enkhnaran Tumurbaatar

    (Brain Science Institute, Graduate School, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia)

  • Battuvshin Lkhagvasuren

    (Brain Science Institute, Graduate School, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia)

  • Otgonbayar Luvsannorov

    (Department of Neurology, School of Medicine, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia)

  • Damdindorj Boldbaatar

    (Department of the Health Research, Graduate School, and Department of Physiology, School of Biomedicine, Mongolian National University of Medical Sciences, Zorig Street 3, Sukhbaatar District, Ulaanbaatar 14210, Mongolia)

Abstract

Obstructive sleep apnea (OSA) disrupts sleep. This study examined factors related to OSA severity. A cross-sectional, prospective, hospital-based study was conducted with 205 patients who underwent polysomnography (PSG). Demographic, anthropometric, clinical, PSG, and sleep quality assessment data were analyzed. Participants (N = 205) were classified into four groups based on apnea–hypopnea index (AHI); no OSA (AHI < 5/h; N = 14), mild (mOSA, 5 < AHI < 15/h; N = 50), moderate (modOSA, 15 < AHI < 30/h; N = 41), severe (sOSA, 30 < AHI < 60/h; N = 50), and very severe (vsOSA, AHI ≥ 60; N = 50). Men had more severe OSA than women ( p < 0.001). Anthropometric characteristics differed with OSA severity ( p < 0.001). OSA patients had decreased sleep quality and increased excessive daytime sleepiness (EDS). Body mass index (BMI), neck/waist circumference, and blood pressure (BP) differed between groups ( p < 0.001). Patients with vsOSA had the highest Mallampati grades ( p < 0.001). Multiple linear regression indicated that OSA severity was related to gender and sleep quality. PSG parameters (oxygen saturation, systolic BP, and arousal/respiratory arousal) were strongly related to OSA severity. In conclusion, about half of study-referred patients had severe/very severe OSA; these groups were predominantly obese men with high BP. OSA severity associated with high BP, BMI, waist circumference, and neck circumference.

Suggested Citation

  • Shuren Dashzeveg & Yasunori Oka & Munkhjin Purevtogtokh & Enkhnaran Tumurbaatar & Battuvshin Lkhagvasuren & Otgonbayar Luvsannorov & Damdindorj Boldbaatar, 2021. "Obstructive Sleep Apnea in a Clinical Population: Prevalence, Predictive Factors, and Clinical Characteristics of Patients Referred to a Sleep Center in Mongolia," IJERPH, MDPI, vol. 18(22), pages 1-12, November.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:22:p:12032-:d:680465
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    References listed on IDEAS

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    1. Janine Gronewold & Robert Haensel & Christoph Kleinschnitz & Helmut Frohnhofen & Dirk M. Hermann, 2019. "Sleep-Disordered Breathing in Hospitalized Geriatric Patients with Mild Dementia and Its Association with Cognition, Emotion and Mobility," IJERPH, MDPI, vol. 16(5), pages 1-18, March.
    2. Hyeon Hui Kang & Ji Young Kang & Jick Hwan Ha & Jongmin Lee & Sung Kyoung Kim & Hwa Sik Moon & Sang Haak Lee, 2014. "The Associations between Anthropometric Indices and Obstructive Sleep Apnea in a Korean Population," PLOS ONE, Public Library of Science, vol. 9(12), pages 1-12, December.
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