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KMID : 1002120040010020037
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Journal of Korean Sleep Research Society
2004 Volume.1 No. 2 p.37 ~ p.41
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Body Mass Index and Neck Circumference in Patients with Obstructive Sleep Apnea-Hypopnea Syndrome
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Han Sun-Jung
Joo Eun-Yeon
Kim Jee-Hyun
Kim Min-Sung
Hong Seung-Bong
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Abstract
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Background: Obstructive sleep apnea-hypopnea syndrome(OSAHS) is a common sleep disorder which produces excessive daytime sleepiness, reduced quality of nocturnal sleep, and increased risk for hypertension and stroke. We investigated the clinical factors related to the severity of OSAHS.
Method: We reviewed the clinical data and night polysomnography results of 189 patients(156 male, 33 female) with sleep disordered breathing in history. Body mass index(BMI) and neck circumference(NC) at the level of the cricothyroid membrane were measured and all patients completed a questionnaire covering daytime sleepiness, observed sleep apnea, nocturnal choking, morning headache and other clinical information. Patients were divided into four groups ‘AHI<5’(apnea-hyponea index, AHI=0~4.9), ‘mild OSAHS’ (5~14.9), ‘moderate OSAH S’(15~29.9), and ‘severe OSAHS’( 30). Difference of each clinical variable was tested among four groups.
Result: One hundred eighty-nine patients(156 male, 33 female) were classified to 25(13.2%) in ‘AHI<5’, 64(33.9%) in mild OSAHS, 38 (20.1%) in ‘moderate OSAHS’ and 62(32.8%) in ‘severe OSAHS’. Mean NC was 35.98±3.15cm in ‘AHI < 5’, 37.53±2.89cm in ‘mild OSAHS’, 39.54±2.01cm in ‘moderate OSAHS’ and 40.53±2.83cm in ‘severe OSAHS’(p<0.001). BMI was 23.1±3.2 in ‘AHI < 5’, 24.1± 2.4 in ‘mild OSAHS’, 25.2±2.3 in ‘moderate OSAHS’ and 26.8±2.6 in ‘severe OSAHS’(p<0.001). Male was predominant in ‘moderate’ and ‘severe OSAHS’(92.1 and 90.3%). ‘Severe OSAHS’ showed more frequent history of observed sleep apnea, nocturnal chocking and the presence of hypertension(p<0.001).
Conclusion: BMI and neck circumference were positively correlated with the severity of OSAHS. ‘Severe OSAHS’ showed male preponderance and more frequent co-morbidity with hypertension.
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KEYWORD
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Obstructive sleep apnea hypopnea syndrome, Apnea-hypopnea index, body mass index, neck circumference, hypertension
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