Factors associated with shift work disorder among nurses in a private hospital Bangkok Thailand

Abstract

Background : Shift work disorder (SWD) is a kind of circadian rhythms sleep disorder related to sleep problem and shift work schedule. SWD is classified by excessive daytime sleepiness and/or insomnia equal or more than 1 month which is related to shift work schedule. Nurse is a health profession who work as a shift schedule. The aim of this study is to identify associated factors of shift work disorder (SWD) among private hospital nurses.

Method : A questionnaire-based cross-sectional study was conducted among 207 registered nurse in a private hospital in Bangkok, Thailand. Standard questionnaire including insomnia (Bergen Insomnia Scale), fatigue (Fatigue Questionnaire), depression (Patient Health Questionnaire-9) and SWD was administered. The descriptive data were presented by mean and percentage .The prevalence of shift work disorder was calculated. The association between independent variable to SWD were analyzed by Chi-square. Crude and adjusted odd ratio analyses were performed by binary logistic regression to assess the relation.

Results: In this study, mean age of registered nurse were 32.46(± 7.27) years. Most of them were female (94.1 %) and single (71.7%) .The prevalence of SWD among private hospital nurses is 23.9%. In multivariate analyses, we found physical fatigue was increased 3.842 fold-odds of having SWD (AOR = 3.842; 95%CI 1.635, 9.027). Moderate and severe depression and noise exposure during the night were increased 3.224 fold-odds (AOR = 3.224; 95%CI: 1.108, 9.386) and 3.107 fold-odds (AOR = 3.107; 95%CI: 1.261, 7.659) of having SWD respectively. However, insomnia and mental fatigue were not associated with SWD.

Conclusion: One quarter number of nurses in this study reported of SWD and found the factors associated with this were physical fatigue, depression and noise exposure during the night time. Mental health and sleep hygiene management program should consider for enhancing shift work disorder among nurses.