新诊断2型糖尿病患者平均血糖的相关因素分析

目的:通过研究新诊断的2型糖尿病患者平均血糖(MBG)与糖化血红蛋白A1c(Hb A1c)及其它代谢、血糖波动指标的关系,分析影响该人群MBG的相关因素。方法:90例来自广东省4家医院的新诊断2型糖尿病患者,检测空腹血糖、血脂、胰岛素及OGTT 2 h血糖、胰岛素,并进行72 h的连续动态血糖监测,计算MBG以及血糖波动参数。结果:血糖波动参数血糖标准差、平均血糖波动幅度、日间血糖平均绝对差(MODD)及血糖波动最大幅度(DMMG)]、Hb A1c、空腹血糖以及服糖后2 h血糖均与MBG相关(P0.01);逐步线性回归提示Hb A1c、MODD、DMMG及空腹血糖与MBG有最强关联性(P0.05)。纳入以上4个指标的线性拟合方程较仅纳入Hb A1c的线性拟合方程更精确。结论:影响我国新诊断2型糖尿病患者MBG的因素包括Hb A1c、空腹血糖、DMMG以及MODD。在临床上单纯依靠Hb A1c推算新诊断2型糖尿病患者的MBG可能存在误差。

Factors affecting mean blood glucose level of newly diagnosed type 2 diabetes patients

AIM: To detect hemoglobin A1c (HbA1c) and parameters of blood glucose fluctuation in Chinese newly diagnosed type 2 diabetes mellitus (T2DM) patients, and further to specify the factors that were related to mean blood glucose (MBG) in this population. METHODS: Newly diagnosed T2DM patients (n=90) from 4 hospitals in Guangdong province were enrolled, and subjected to 3 d continuous glucose monitoring (CGM) after testing for HbA1c and other laboratory tests. Blood glucose data collected during CGM were used to calculate MBG and parameters of blood glucose fluctuation. RESULTS: Correlation analysis revealed that MBG was significantly related to all parameters of blood glucose fluctuation, HbA1c, fast plasma glucose (FPG) and 2 h postprandial glucose (P <0.01), but not to sex, age or blood lipid profile. Further analysis utilizing step-wise general linear model showed that HbA1c, absolute means of daily difference (MODD), difference between maximal and minimal glucose (DMMG) and FPG had the strongest relation to MBG. CONCLUSION: Factors affecting MBG of the newly diagnosed T2DMpatients in our country include HbA1c, FPG, DMMG and MODD, and thus it may be prone to misleading results that only HbA1c is applied to estimate MBG in this population.