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Original Article
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The Effect of Day and Night Shift on Risk Factors of Cardiovascular Disease in Automobile: Manufacturing Plant Workers
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Jae Haek Shin, Jung Jeung Lee, Kyeong Soo Lee, Joon Sakong, Chang Yoon Kim, Jong Hak Chung
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Korean Journal of Occupational and Environmental Medicine 1995;7(1):28-45. Published online February 28, 1995
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DOI: https://doi.org/10.35371/kjoem.1995.7.1.28
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 Abstract
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- An investigation of effects of shift work on cardiovascular risk factors has been carried out on workers of a motor company in Ulsan, for 2 months from 20 April to 20 June,1993. This cross-sectional survey was designed to compare the shift workers (n=420) with day workers (n=88). The study subjects were drawn from workers who were employed in twelve hour shift system. A control group who never experienced shift work was drawn from different sections of the factory. Each worker completed a medical and occupational questionnaire and cardiovascular risk factors such as blood pressure, total cholesterol, triglyceride, apolipoprotein A-1 and B were measured. In univariate analysis, apolipoprotein B and the ratio of apolipoprotein B to apolipoprotem A-1 increased in shift workers. In multiple regression analysis for the systolic blood pressure, shift work was significant independent variable (p=0.059). In multiple regression analysis for the cholesterol, age and body mass index were significant independent variables(p<0.01), but shift work was not a statistically significant independent variable. In multiple regression analysis for the ratio of apolipoprotein B to apolipoprotein A-1, shift work was significant independent variable (p<0.05). Shift workers who have engaged in shift work more than 5 years have an excess of total cholesterol, apolipoprotein B and ratio of apolipoprotein B to apolipoprotein A-1 than those who have engaged in shift work less than 5 years (p<0.05). In multiple regression analysis for the cholesterol, duration of shift work was a significant independent variable (p=0.012). In multiple regression analysis for the apolipoprotein B and ratio of apolipoprotein B to apolipoprotein A-1, duration of shift work was not a significant independent variable.
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KSOEM
