alexa The Correlation of Physical Parameters and Apnea-Hypopnea Index in OSA Suspected Thai Patients
ISSN: 2167-0277

Journal of Sleep Disorders & Therapy
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Research Article

The Correlation of Physical Parameters and Apnea-Hypopnea Index in OSA Suspected Thai Patients

Nuntigar Sonsuwan1, Sutida Ameiam2 and Kittisak Sawanyawisuth3*
1Department of Otolaryngology, Chiang Mai University, Chiang Mai, 50200, Thailand
2Uttaradit Hospital, Uttaradit, Thailand
3Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
Corresponding Author : Kittisak Sawanyawisuth
Faculty of Medicine, Department of Medicine
Khon Kaen University, Khon Kaen, 40002, Thailand
Tel: 66-43-363664
Fax: 66-43-348399
E-mail: [email protected]
Received April 15, 2013; Accepted May 20, 2013; Published May 24, 2013
Citation: Sonsuwan N, Ameiam S, Sawanyawisuth K (2013) The Correlation of Physical Parameters and Apnea-Hypopnea Index in OSA Suspected Thai Patients. J Sleep Disord Ther 2:119. doi:10.4172/2167-0277.1000119
Copyright: © 2013 Sonsuwan N, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

 Most Asian countries have limited resources for polysomnography. Risk factors for Obstructive Sleep Apnea

(OSA) in Asian populations may be different from the Western countries. Knowing the physical risk factors for OSA
may be a helpful tool for clinicians to select suitable patients to be tested for OSA. We enrolled consecutive OSAsuspected
patients between October 1st, 2006 and September 30th, 2007. Physical factors including Body Mass
Index (BMI), Neck Circumference (NC), and Waist Circumference (WC) were recorded. The correlations of BMI,
NC, WC and Apnea-Hypopnea Index (AHI) were executed. Various cut points of BMI, NC, and WC were calculated
for sensitivity and specificity of severity of OSA. During the study period, there were 66 patients enrolled. All three
parameters (BMI, NC, and WC) were significantly correlated with AHI. The highest correlation index was between
BMI and AHI (0.604), whereas the correlation index of AHI-WC and AHI-NC were 0.571 and 0.440, respectively.
Only BMI and WC, but not NC, were significantly related to severity of OSA. The BMI of more than 25 kg/m2 had the
highest sensitivity (93.8%) for severe OSA, whereas WC more than 101.8 cm had the highest specificity (92%). In
conclusion, BMI, WC, and NC are correlated with AHI in OSA suspected Thai patients. BMI and WC, but not NC,
were associated with severity of OSA. In resource-limited facilities, these parameters may be helpful for clinicians to
evaluate the risk of OSA more appropriately.

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