An ongoing prospective cohort study of female nurses working in the Kanto region of Japan was conducted at 93 hospitals, each of which had no fewer than 200 beds in its general ward, to demonstrate the factors that contribute to nurse turnover. In a follow-up survey conducted six months later, the cooperation of nursing directors from 75 hospitals was gained and subsequently, responses from 5,387 nurses out of 8,327 nurses from the 93 hospitals, which participated in the baseline survey, were collected. Among the 3,756 nurses who met these three requirements: worked as a nurse, worked the night shift, and worked in a hospital ward, 3,456 responses to a questionnaire about accidents and/or incidents experienced in the past six months were analyzed. The findings of the logistic regression analysis showed that nurses who worked the night shift and always worked overtime experienced accidents and/or incidents 1.734 times more often than nurses who reported no overtime (95% confidence interval, 1.024-2.983, p=0.041), and that nurses who reported being absent due to sickness during the previous six months experienced accidents and/or incidents 1.347 times more often than nurses without any absences (95% confidence interval, 1.044-1.737, p=0.022). Regarding health statusrelated quality of life (QOL), when limitations at work due to changes in mental function were improved by one point, the frequency of experiencing accidents and/or incidents increased 0.995 times (95% confidence interval, 0.992-0.998, p=0.004); as well, when limitations in social function were improved by one point, the frequency of experiencing accidents and/or incidents increased 0.993 times (95%confidence interval, 0.987-0.998, p=0.006).
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