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糖化血红蛋白在老年人群诊断2型糖尿病标准的意义 被引量:7

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摘要 目的探讨老年人群中糖化血红蛋白(HbA1c)诊断糖尿病(DM)的理想切点及可行性。方法采用分层随机抽样方法选择石家庄市9个社区,居住5年以上年龄≥60岁的社区居民,进行横断面流行病学调查,共调查1 220例。其中符合入选条件的938例行口服75 g葡萄糖耐量试验(OGTT);测定空腹血糖、服糖后2 h血糖及HbA1c。采用受试者工作特征曲线(ROC曲线)进行判断,得到以OGTT诊断DM的HbA1c值,计算最佳切点。并与OGTT试验诊断标准比较,评价两者对于DM诊断率的差异。结果按照1999年WHO的DM诊断标准,研究人群中糖耐量正常(NGT)440例,空腹血糖受损(IFG)69例,糖耐量低减(IGT)148例,合并IFG+IGT 73例,新诊断DM(NDDM)208例。通过绘制ROC曲线,得到HbA1c与诊断DM相关的临界点为6.2%,敏感性和特异性分别为69.8%和95.8%,曲线下面积为0.860(95%CI 0.832~0.898)。与OGTT结果的符合率为77.5%。以HbA1c≥6.2%作为DM诊断切点,阳性似然比(-LR)16.62,阴性似然比(-LR)0.32,阳性预测值(+PV)75.4%,阴性预测值(-PV)78.1%。结论 HbA1c≥6.2%作为石家庄市老年人群筛查DM切点具有较高敏感度与特异度,可作为临床DM筛查的切点。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2013年第5期1011-1014,共4页 Chinese Journal of Gerontology
基金 石家庄市科技指导计划(No.121461173)
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