DOI: 10.5061/dryad.905qftthw
title: Data from: Association between night-shift work, sleep quality, and health-related quality of life : a cross-sectional study among manufacturing workers in a middle-income setting

description: Objectives: Night-shift work may adversely affect health. This study aimed
 to determine the impact of night-shift work on health-related quality of
 life (HRQoL), and assess whether sleep quality was a mediating factor.
 Design: Cross-sectional study. Setting: 11 manufacturing factories in
 Malaysia. Participants: 177 night-shift workers aged 40 to 65 years old
 were compared with 317 non-night-shift work. Primary and secondary
 outcomes: Participants completed a self-administered questionnaire on
 socio-demography and lifestyle factors, short Form-12v2 Health Survey
 (SF-12), and the Pittsburgh Sleep Quality Index (PSQI). Baron and Kenny’s
 method, Sobel test and multiple mediation model with bootstrapping were
 used to determine whether PSQI score or its components mediated the
 association between night-shift work and HRQoL. Results: Night-shift work
 was associated with sleep impairment and HRQoL. Night-shift workers had
 significantly lower mean scores in all the eight SF-12 domains
 (p&lt;0.001). Compared to non-night shift workers, night-shift workers
 were significantly more likely to report poorer sleep quality, longer
 sleep latency, shorter sleep duration, sleep disturbances, and daytime
 dysfunction (p&lt;0.001). Mediation analyses showed that PSQI global
 score mediated the association between night-shift work and HRQoL.
 “Subjective sleep quality” (indirect effect=-0.24, standard error
 [SE]=0.14, bias corrected 95%Confidence Interval [BC 95%CI]: -0.58 to
 -0.01) and “sleep disturbances” (indirect effect=-0.79, SE=0.22, BC 95%CI:
 -1.30 to -0.42) were mediators for the association between night-shift
 work and physical wellbeing, whereas “sleep latency” (indirect
 effect=-0.51, SE=0.21, BC 95%CI: -1.02 to -0.16) and “daytime dysfunction”
 (indirect effect=-1.11, SE=0.32, BC 95%CI: -1.86 to -0.58) were mediators
 with respect to mental wellbeing. Conclusion: Sleep quality partially
 explains the association between night-shift work and poorer HRQoL.
 Organisations should treat the sleep quality of night-shift workers as a
 top priority area for action in order to improve their employees’ overall
 wellbeing.
description: Data was collected from participants of SOCSO HSP.
 The demographic and
 lifestyle characteristics of participants were compared according to their
 shift work status. All categorical variables were described by proportions
 and compared using Chi-square test. The non-parametric Mann-Whitney U test
 was used for asymmetrical continuous variables. The Baron and Kenny’s method and
 Sobel test were applied to assess whether the association between
 night-shift work and HRQoL was mediated by the PSQI global
 score. To explore
 sleep quality dimensions, multiple mediation analysis using the PROCESS
 macro on SPSS version 21 developed by Hayes was employed to test a
 multiple mediation model with the seven components of the PSQI
description: Readme 1. Data include raw data 
 2. Analysis using bootstrapping method to determine whether sleep
 mediate shift work and QOL 3. Baron and Kenny method to
 determine lifestyle factor mediate shift work and QOL