60岁及以上2型糖尿病患者发生夜间低血糖的危险因素分析

应用动态血糖监测系统对51例≥60岁2型糖尿病患者进行血糖监测，统计发生夜间低血糖（血糖≤3．9mmol／L）的例数和事件数，分析相关危险因素。共有22例患者发生了681次夜间低血糖，性别、年龄、糖尿病病程、治疗方案、睡前最高和平均血糖值均不是老年糖尿病患者发生夜间低血糖的危险因素。睡前最低血糖值与患者是否发生夜间低血糖关系密切（OR=0．36，95％CI：0．13～1．00，P〈0．05）。受试者工作特征曲线分析显示，睡前血糖≤6．2mmoL／L是预测夜间低血糖发生与否的最佳临界点。

The risk factors of nocturnal hypoglycemia in elderly patients with type 2 diabetes

This study was to evaluate the risk factors of nocturnal hypoglycemia in elderly patients with type 2 diabetes by continuous glucose monitoring system. Fifty-one type 2 diabetic patients aged 60 or above were enrolled and the episodes of nocturnal hypoglycemia were documented. The risk factors of nocturnal hypoglycemia were analyzed by logistic regression and the cut-off of glucose levels at bedtime for nocturnal hypoglycemia was evaluated. There were twenty-two patients with total 681 nocturnal hypoglycemic episodes. Logistic regression analysis showed that the lowest glucose level at bedtime was the risk factor of nocturnal hypoglycemia (OR=0.36, 95% CI:0.13-1.00, P<0.05), while the gender, age, diabetes duration, therapy regimen, the highest and average glucose levels at bedtime were not associated to nocturnal hypoglycemia. Receiver operating characteristic curve (ROC) showed that the bedtime glucose at≤6.2 mmol/L was the best cut-off point for predicting nocturnal hypoglycemia.