A total of 6,023 participants were recruited to investigate differences in and among late night shift workers.
Late night shift workers (LSWs) and non-late night shift workers (non-LSWs) reported higher sleep reactivity and sleep effort compared to non-shift workers (non-SWs).
LSWs exhibited greater sleep reactivity and effort than non-LSWs.
Higher sleep reactivity and sleep effort scores for all groups were correlated with insomnia, daytime sleepiness, and depressive symptoms.
The findings suggest that working late night hours may increase sleep reactivity and sleep effort, which are linked to sleep and mood disturbances.
Simplified
OBJECTIVE: The current study aimed to investigate the differences in and differs among late night shift workers (LSWs) and non-late night shift workers (non-LSWs), and non-shift workers (non-SWs).
METHODS: In total, 6,023 participants (1,613 non-SWs, 3,339 LSWs, and 1,071 non-LSWs) were recruited. Non-SWs was defined as those who works at fixed schedules during standard daylight. LSWs was defined as who work late night hours (10 PM-6 AM), while non-LSWs was SWs who did not work during late night. All completed the Ford Insomnia Response to Stress Test (FIRST), the Glasgow Sleep Effort Scale (GSES), the Pittsburgh Sleep Quality Index (PSQI), the Epworth Sleepiness Scale (ESS), the Insomnia Severity Index (ISI), and the short-term Center for Epidemiologic Studies-Depression scale (CES-D) through online survey.
RESULTS: LSWs and non-LSWs reported higher FIRST, GSES scores than non-SWs. In addition, LSWs reported higher FIRST, GSES scores than non-LSWs. FIRST scores were correlated with CES-D, PSQI, ISI, and ESS for LSWs, non-LSWs, and non-SWs alike. GSES scores were also correlated with CES-D, PSQI, ISI, and ESS for LSWs, non-LSWs, and non-SWs alike.
CONCLUSION: SWs showed higher sleep reactivity and sleep effort than non-SWs. LSWs had higher sleep reactivity and sleep effort than non-LSWs, and these variables are associated with insomnia, daytime sleepiness, and depressive symptoms. Our findings suggests that late night schedule, may increase sleep reactivity and sleep effort, which are associated with sleep and mood disturbances.
Key numbers
14.67
Higher FIRST Scores in LSWs
FIRST scores comparing non-SWs, LSWs, and non-LSWs.
49.32
Higher GSES Scores in LSWs
GSES scores comparing non-SWs, LSWs, and non-LSWs.
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