Study on the establishment of the effective occupational health management system in shift workern -analyzing the heart rate variability-

目的：探讨轮班工作对个体自主神经功能失衡的影响。适应过程的变化和失调的外部因素的特点。同时探讨了自主神经系统检查结果与主观症状的关系。考虑到工人的健康习惯。我们还根据这项研究考虑了有效的工作时间表和生活方式指导。研究对象：我们研究了一家钢管制造厂的124名工人。结果与讨论：心率变异性和自动神经功能测量：交感神经系统在工作时间之间表现优越，副交感神经系统在陡峭时间之间表现优越。夜间工作2 ~ 3小时的交感神经系统活动明显低于白天工作3 ~ 3小时的交感神经系统活动。此外，在睡眠时间和夜间工作时间之间，交感神经系统的活动也会升高到…我们认为倒班工人的自主神经功能存在一个适应过程。问卷调查：不同工作方式的员工主观症状无显著差异。夜间工作4次的人比夜间工作2次和1次的人睡眠质量更好。一般健康问卷（GHQ）调查结果显示，倒班工人的身心健康状况优于日班工人。我们认为，可能影响GHQ得分的因素是轮班的习惯和白天和晚上的工作环境。健康实践指数（HPI）结果显示，日工对生活方式有良好的健康习惯。工作压力源检查表（WSC）的结果显示，工作方式之间没有差异。轮班工人血压的回顾性研究不同工作方式之间收缩压（SBP）和舒张压（DBP）无差异。我们认为这些结果可能是健康工作者效应的表现。干预研究不同工作方式的收缩压和舒张压无差异。但主观症状、睡眠和健康习惯明显改善。结论：我们能够区分倒班工作和夜间工作在睡眠点恢复时自主神经系统的适应过程。通过我们的干预，我们能够改善主观因素。少

Purpose : We investigated the influences of shift work---the imbalance of individual autonomic nervous function. the change of the adaptation process and the characters of the external factors about the diseord. Also we investigated the relation between the results of autonomic nervous system and subjective symptoms. considering the health practice of the worker. We also considered effective work schedules and lifestyle guidance based on this study.Subjects : We studied 124 men working at a steel pipe manufacturing plant.Results ＆ discussion :1. Measurement of heart rate variability and the automatic nervous functionSympathetic nerve system was superior between work-time while parasympathetic nerve system was superior between steep-time. Activity of sympathetic nervous system between sleep-time on the 2^<nd> night-work was significantly lower than that of the 3^<rd> day-work. Also the activity of sympathetic nervous system between sleep-time on the 4^<th> night-work elevated as high as … More day-work. We supposed there was an adaptation process in autonomic nervous function in shift workers.2. Questionnaire studyThere was no difference in subjective symptoms between work styles. Sleep improved in the 4^<th> night-work than in the 2^<nd> night-work. Also, shift workers were better in the mental and physical health than day-workers researched by General Health Questionnaire (GHQ). We considered that the factors, with may influence the GHQ score, are the custom to the shift-work and work environment during day and night-time. Day-worker had good health practice about their lifestyle shown by Health Practice Index (HPI) results. These was no difference between work styles shown by Work Stressor Check list (WSC) results.3. Retrospective study about the blood pressure of shift workerThere was no difference about Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) between work styles. We considered that these results might be a manifestation of healthy worker effect.4. Intervention studyThere was no difference about SBP and DBP between work styles. But subjective symptoms, sleep and health practice were improved significantly.Conclusion : We were able to classify the adaptation process about autonomic nervous systems in shift work and recovery from night work at the point of sleep. And we were able to improve in the subjective factors by our intervention. Less