The Change of Sleep Quality after Transition to Consecutive Day Shift from Day and Night Shift: A Motor Assembly Factory Case

Impact of reduced night work on shift workers’ sleep using difference-in-difference estimation

“…In another quasi-experimental study conducted at a Korean automobile manufacturer, the quality of sleep and sleep duration were improved only during night shift weeks, 24 similar to the results of this study. Among Norwegian nurses who participated in the Survey on Shift work, Sleep and Health, the workers who quit night work experienced fewer symptoms of insomnia than the nurses who continued working night shifts.…”

“…In a previous Korean study that investigated changes in sleep quality among workers at an automobile manufacturer that introduced a very similar shift system to that in this study, while both the quality of sleep and sleep duration during the evening shift weeks were significantly improved, however, there was no statistically significant change during the day shift weeks. 24 In the new shift system, daytime work began at 7:00 am (1 h earlier than in this study) and the end time of the evening shift was 1:30 am. (1.5 h later than in this study).…”

“…One notable quasi‐experimental study in Korea observed improvement in sleep quality of shift workers during night shift weeks at an automobile assembly factory after reducing working hours including overnight work. 24 However, a control group was not included in this study. To address this evidence gap, we designed a quasi‐experimental study with a control group as an alternative design for the evaluation of organizational intervention on a work schedule.…”

“…More studies with a longitudinal approach are required to obtain causal evidence whether reducing night work could lead to improvement in sleep. One notable quasi‐experimental study in Korea observed improvement in sleep quality of shift workers during night shift weeks at an automobile assembly factory after reducing working hours including overnight work 24 . However, a control group was not included in this study.…”

Decrease in Stress Response and Related Factors After Transition to Consecutive Day Shift from Day and Night Shift: A Motor Assembly Factory Case

“…개인적 접근은 다양하게 시도되어 왔으며, 효과에 대한 검증도 많이 이루어진 반면, 직업환경적 접근은 상대적으로 적고, 그 중에 서도 노동시간개선의 효과를 평가한 연구는 소수에 불과하였다 (Lamontagne et al, 2007;Montano et al, 2014). 분석하였다 (Song, 2015).…”