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| Research on the relationship between body mass index and sleep architecture changes in patients with obstructive sleep apneahypopnea syndrome |
| YANG Hua1, XI Feng1, DING Yong-jie2, ZHOU Zhi-cai1 |
1.Department of Respiration, Pudong People′s Hospital of Shanghai, Shanghai 201200; 2.Department of Respiration, Ruijin Hospital of Shanghai, Shanghai 200025, China |
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Abstract [Abstract] Objective: To investigate the relationship between body mass index(BMI) and sleep structure in patients with obstructive sleep apneahypopnea syndrome (OSAHS)． Methods： A total of 182 patients were diagnosed by polysomnography(PSG) and divided into 4 groups: snorer, mild, middle and sever．The percentage of sleep stages of non-rapid eye movement and rapid eye movement, apnea-hypopnea index(AHI), BMI and microarousal(MI) were analyzed. Results： There were significant differences in BMI between snorer, mild, middle and sever group, respectively．The percentage of sleep stages(awaking time, S1, S2, S3+S4) also had significant difference in different groups, respectively. The correlation of BMI and AHI, MI and AHI was positive．And there was negative correlation between S3+S4 and AHI． Conclusion： The values of AHI were highly correlated with BMI, high BMI may be involved in the increased severity of OSAHS. Patients with OSAHS had disordered sleep structure, which was significantly associated with the severe degree of the lesion as indicated by AHI．
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Received: 06 September 2012
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2012, Vol. 22 
