空腹血糖受损下限切点下调对中国成人糖调节异常分布的影响

目的　明确美国糖尿病学会 2 0 0 3年修订的空腹血糖受损 (IFG)的下限新切点 (5 6mmol/L)对中国成人糖调节异常各组分患病率的影响 ,并探讨新切点的诊断价值。方法　研究对象为 1994年全国糖尿病防治协作组资料库中具有完整口服糖耐量试验 (OGTT)资料的 15 5 6 4例中国成人 (≥ 2 5岁 )。以空腹血糖 (FPG) 5 6mmol/L(简称新标准 )和 6 1mmol/L(简称旧标准 )作为IFG的诊断下限切点 ,分别计算单纯空腹血糖受损 (i IFG)、单纯糖耐量异常 (i IGT)、同时IFG和IGT(IFG/IGT)的患病率。以OGTT 2h血糖 (7 8mmol/L≤PG2h <11 1mmol/L)为诊断糖调节异常(IGR)的金标准 ,分析不同FPG水平对IGR诊断的敏感性和特异性 ,并描绘FPG诊断IGR的ROC曲线 (receiveroperatorcharacteristiccurve)。 结果　 (1)i IFG、i IGT和IFG/IGT患病率以旧标准诊断分别为 8 71%、12 0 8%和 5 95 % ,以新标准诊断分别为 2 1 2 5 %、6 89%和 11 13%。 (2 )ROC分析提示诊断IGR的FPG最佳切点为 5 6mmol/L ,此切点的敏感性和特异性分别为 6 1 9%和 6 3 9%。结论　FPG标准从 6 1mmol/L下调至 5 6mmol/L使本组人群IFG患病率增加 1 2倍。从尽量缩小IFG和IGT诊断分歧的角度 ,IFG的下限切点为 5 6mmol/L可能是合适的。

Impact of lowering the cut-point for impaired fasting glucose on the distribution of impaired glucose regulation subcategories in Chinese adult population

OBJECTIVE: To evaluate the impact of lowering of cut-point value for impaired fasting glucose (IFG) from 6.1 mmol/L to 5.6 mmol/L. by the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus, US, on the prevalence rates of different impaired glucose regulation (IGR) subcategories in Chinese adults, and to explore the ability of the new cut-point to diagnose IGR. METHODS: The data of 15 564 persons undergoing standard 75 g oral glucose tolerance test (OGTT) in the National Diabetes Mellitus Survey (1994) in Chinese adults (>or= 25 years) were reanalyzed. The prevalence of isolated impaired fasting glucose (i-IFG), isolated impaired glucose tolerance (i-IGT), and combined IFG and IGT (IFG/IGT) were calculated by the new criteria of 5.6 mmol/L