Working Conditions and Fatigue in Japanese Shift Work Nurses: A Cross-sectional Survey

Mar 19, 2022Asian nursing research

Work Factors and Tiredness in Japanese Nurses Working Shifts: A Survey Study

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Abstract

A threshold of 9 hours 50 minutes for daily working hours during day shifts is associated with a fatigue score of 3.0 or higher in two-shift rotation nurses.

The threshold for daily working hours during night shifts in a two-shift rotation is 17 hours 15 minutes.
For two-shift rotation, having 8.0 days of night shifts is linked to increased fatigue.
In three-shift rotation, a threshold of 9 hours 45 minutes for daily working hours is associated with high fatigue.
A threshold of 2.9 days for midnight shifts is related to increased fatigue in three-shift rotation nurses.
An interval of 2.0 times within 12 hours between day-shift and night-shift assignments is connected to higher fatigue levels.

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PURPOSE: This study aimed to identify the working conditions (working hours, overtime work, number of night shifts, number of holidays, and work intervals) associated with fatigue, based on the shift patterns, and determine their thresholds.

METHODS: From January to February 2020, a web-based questionnaire was sent to 4601 shift work nurses at 47 hospitals in Japan. The multivariate logistic analysis was conducted to predict high- and low-fatigue groups by working conditions, and receiver operating characteristic analysis was performed to clarify the high-fatigue thresholds by shift pattern.

RESULTS: A total of 386 shift work nurses participated in this study. The threshold (fatigue was 3.0 or higher) of the two-shift rotation was 9 hours 50 minutes for daily working hours during day shifts (Odds ratio [OR] = 1.57, p < .01), 17 hours 15 minutes for daily working hours during night shifts (OR = 1.20, p < .01), and 8.0 days for the number of night shifts (OR = 1.09, p = .02). The threshold of the three-shift rotation was 9 hours 45 minutes (OR = 1.59, p < .01), 2.9 days for the number of midnight shifts (OR = 1.53, p < .01), and 2.0 times for the interval between day-shift and night-shifts within 12 hours (OR = 1.39, p < .01).

CONCLUSION: Working hours and the number of night shifts are important for two-shift rotation, and working hours for the assignment of midnight shift are important for three-shift rotations. Nurse managers should manage shifts according to nurses' shift patterns.

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Working Conditions and Fatigue in Japanese Shift Work Nurses: A Cross-sectional Survey

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