目的:探讨基于动态血糖监测系统（CGMS）评价扫描式血糖监测系统判断2型糖尿病（T2DM）患者黎明现象的有效性。方法:采用便利抽样法，选取2019年6月—2020年6月于新乡市中心医院内分泌科住院的45例T2DM患者为研究对象。患者入院后先佩戴扫描式动态血糖监测系统，48 h后再佩戴CGMS行连续血糖监测，再过72 h后同时取下扫描式动态血糖监测系统和CGMS，核对同时间段的血糖分析报告，判断是否发生黎明现象。采用Kappa检验分析CGMS与扫描式血糖监测系统判断黎明现象的一致性，以CGMS判断结果为标准，绘制扫描式血糖监测系统判断黎明现象的ROC曲线，评定夜间血糖预测黎明现象及次日空腹血糖评估黎明现象的最佳切点值。结果:CGMS判断55.56%（25/45）的患者、扫描式血糖监测系统判断46.67%（21/45）的患者发生黎明现象，两者比较差异无统计学意义（χn 2=0.711，n P>0.05）。CGMS和扫描式血糖监测系统判断黎明现象的一致性良好（Kappa=0.895，95%n CI为1.130～4.883，n P0.05]. Consistency analysis showed that Kappa value was 0.895, and the consistency of CGMS and scanning glucose monitoring system in judging dawn phenomenon was good (Kappa=0.895, 95%n CI 1.130-4.883, n P<0.01) . The optimal tangent value of night blood glucose for predicting dawn phenomenon was 8.31 mmol/L, and the optimal tangent value of the next day fasting blood glucose for evaluating dawn phenomenon was 7.25 mmol/L. The value of the area under the ROC curve were 0.729 and 0.803 respectively.n Conclusions:Scanning blood glucose monitoring can accurately judge the dawn phenomenon. When the night blood glucose value is 8.31 mmol/L, it indicates that the dawn phenomenon may occur. When the next day's fasting blood glucose value is 7.25 mmol/L, it indicates that the dawn phenomenon may already occur.