Abstract: Objective To analyze the correlation between the palate/tongue(P/T)ratio and the severity of obstructive sleep apnea hypopnea syndrome(OSAHS)patients with symptoms of level, and make a comparison of P/T ratio with Friedman stage. Methods One hundred and ten patients with OSAHS who were referred to our hospital between December 2010 and August 2012, were enrolled in this study. Computed tomography(CT)scans were performed from the skull base to the thyroid cartilage, and the middle and sagittal reconstruction images of the pharyngeal region were obtained. The length of the soft palate means the distance from the base of the soft palate to the tip of the uvula, and the lingual thickness means the distance from the genial tubercle to the foramen cecum linguae. The P/T ratios of length of the soft palate to the lingual thickness were measured. Finally, we analyzed the correlation between P/T ratio and apnea hypopnea index(AHI)and compared the P/T ration and Friedman Stage. Results (1) The P/T ratio had significantly positive correlation with AHI(r=0.313, P=0.001)and had negative correlation with Friedman stage(r=-0.196, P=0.041). (2) The P/T ratios had significant differences among different severity OSAHS groups(F=3.478, P=0.019). (3) The P/T ratios had significant differences among different Friedman stage groups(t= 2.131, P=0.035). (4) The multinomial step regression analysis showed that the P/T ratios was the most important factor of AHI(R=0.265, F=19.333, P< 0.001). Conclusion The P/T ratio had significantly positive correlation with AHI in 山东大学耳鼻喉眼学报30卷5期 -史春海,等.阻塞性睡眠呼吸暂停低通气综合征患者腭舌比值与症状程度的相关性分析 \=-OSAHS patients. When P/T ratio increased, the severity of OSAHS also increased. Meanwhile, P/T ratio has a certain consistency with the Friedman stage.

Key words: Tongue thickness, Friedman stage, X-ray computed tomography, Obstructive sleep apnea and hypopnea syndrome, Length of the soft palate