0153 Overcommitment to work impacts the relationship between effort-reward imbalance and insomnia differently for physicians and nurses

Abstract

Introduction Occupational stress is a predictor of sleep problems. Recovery from it by detaching yourself from work-related issues outside of work hours is crucial for sleep health. Shift workers, especially in healthcare, are at a higher risk of sleep problems, which may lead to fatigue and errors at work, impacting patient care. The aim of the study was to 1) verify whether overcommitment to work is a moderator of the relationship between occupational stress and insomnia symptoms, and 2) check if this moderation is impacted by an individual’s occupation – whether overcommitment impacts the relationship of occupational stress and insomnia symptoms the same way for the two biggest occupational groups in healthcare in Poland - physicians and nurses. Methods Participants provided information on their occupation and filled in the Effort-Reward Imbalance questionnaire (ERI) with the Overcommitment (OC) scale, and the Insomnia Severity Index (ISI). Using the PROCESS macro for SPSS, we conducted a moderated regression analysis to test a multiple moderation (Model 3). Results We gathered responses from 281 participants – 178 physicians and 103 nurses. The interaction of ERI and OC was not significant, but a three-way interaction (ERI*OC*occupation) was significant in predicting ISI score. The relationship between ERI and ISI was moderated by OC depending on a respondent’s occupation. For physicians as OC increased the relationship between ERI and ISI increased as well. For nurses as OC increased the relationship between ERI and ISI decreased. Conclusion This study showed that stress at work has the strongest relationship with insomnia when physicians ruminate over work problems, are easily overwhelmed with time pressure and are unable to unwind in their free time. However, when nurses obtain high scores on an overcommitment measure, they will experience sleep problems regardless of the level of occupational stress. Support (if any) This work was supported by the National Science Center in Poland under Grant 2019/33/N/HS6/02572.