We aimed to investigate the association between working hours and poor glycemic control using a cross-sectional data from the Korea National Health and Nutrition Examination Survey (KNHANES). The participants who were medically diagnosed with diabetes mellitus by a physician were defined as diabetic patients, and patients with hemoglobin A1c (HbA1c) levels >9.0% were considered as “poorly controlled”. The association of HbA1c level with working hours was examined by linear regression plot, using local regression line and logistic regression analyses. The local regression plot showed a smooth increasing pattern: the longer were the working hours, the higher were the HbA1c levels, even though it was not statistically significant. Odds ratios of working hours over 52 h per week were higher with the criterion of poor diabetic control (HbA1c >9.0%). The results were significant in elderly female workers (odds ratio 3.30, 95% confidence interval 1.19–9.18). Long working hours were associated with poor glycemic control, specifically among elderly female workers with diabetes.

我们旨在使用韩国国家健康与营养检查调查（KNHANES）的横断面数据调查工作时间与血糖控制不佳之间的关联。由医生在医学上诊断为糖尿病的参与者定义为糖尿病患者，血红蛋白A1c（HbA1c）水平> 9.0％的患者被视为“控制不良”。使用局部回归线和逻辑回归分析，通过线性回归图检查了HbA1c水平与工作时间的关系。局部回归图显示出平稳的增长模式：工作时间越长，HbA1c水平越高，即使它在统计学上不显着。以糖尿病控制不良为标准（HbA1c> 9），每周工作超过52小时的几率较高。0％）。在老年女工中，结果是显着的（赔率3.30，95％置信区间1.19-9.18）。长时间工作与血糖控制不佳有关，特别是在患有糖尿病的老年女性工人中。