A prospective study on the relationship between long work hours and hypertension

我们进行了一项为期5年的前瞻性研究，比较按月平均加班时间分组的参与者发生高血压的风险。研究对象为日本某制造工厂20 ~ 55岁的正常男性工人1316人。加班≧80.0hr/月的工人发生高血压的风险略高于其他工人，但无统计学意义。此外，我们比较了基线调查和第二次调查一年后血压变化的平均值。与其他工人相比，每月加班≧80小时的工人血压的升高幅度不明显，但幅度稍大。这种长时间加班的蓝领工人的舒张压进一步明显升高。调节工作时间对高血压的初级预防和管理很重要。然而，职业因素可能会影响加班时间和血压之间的关系。

We conducted a 5-year prospective study to compare the risk of incident hypertension among participants grouped according to their average monthly overtime work hours. A total of 1,316 normotensive male workers aged 20-55 years in a manufacturing factory in Japan were enrolled. Overtime workers of ≧80.0hr/month had a slightly higher risk for incident hypertension without statistical significance, compared with the other workers. In addition, we compared the means of change in blood pressure after a year from the baseline survey to the second survey. Overtime workers of ≧80.0hr/month had a non-significantly, marginally greater increase in blood pressure, compared with the other workers. Such extensive overtime blue-collar workers had a significantly further increased diastolic blood pressure. Regulation of work hour is important for the primary prevention and management of hypertension. However, occupational factors may have affected the relationship between overtime work hours and blood pressure.