THE COMPARATIVE OF ESTROGEN LEVEL IN NIGHT AND DAY ROTATING SHIFT NURSES

Abstract

          This study aims to compare the estrogen levels in the nurse who working in rotating night shift and day rotating shift by blood test. Nurses who interested to join this project through screening criteria were 40 persons each group, with age 25-40 years old. The data collections were blood collected from vein in day 2-5 of the menstrual cycle and questionnaire for personal characteristic and pattern of shift. It was found that the median estrogen levels of the night rotating shift group and the day rotating shift group were 126.00 pmol/L (IQR 87.70-151.50) and 103.00 (IQR 72.20-133.00) pmol/L, Mann-whitney U test showed statistically significant difference at p-value 0.036. Pattern of shift was categorized in 8 hours/shift, 12 hours/shift and both. The estrogen of participants who had different hours per month of working the night rotating shift and different hours per month of working the day rotating shift were both statistically significant difference at p-value < 0.001. In addition, this study showed the association between number of hours per month of working the night rotating shift , number of hours per month of working the day rotating shift and estrogen level were statistically significant difference at p-value <0.001 and 0.026 ,respectively, analyzed by univariate linear regression. The result of this study was consistent with the hypothesis that the estrogen levels of nurses in the night rotating shift group more than the day rotating shift as well as the higher number of night rotating shift, the higher estrogen levels.