Influence of sleep-wake cycle on body mass index in female shift-working nurses with sleep quality as mediating variable

Wen Pei Chang, Ching Mei Yang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study investigated the relationship between the sleep-wake cycle and body mass index (BMI) of female shift-working nurses and examine the mediating effect of sleep quality on this relationship. We recruited a total of 147 female nurses working monthly rotating shifts at a teaching hospital in Taiwan from the day (n=63), evening (n=50), and night (n=34) shifts. Our research instruments utilized a questionnaire to collect demographic and work-related informa-tion, the Pittsburgh Sleep Quality Index (PSQI), and actigraphs to record sleep patterns for seven consecutive days. The sleep-wake cycles were then estimated using the dichotomy index (I<O). The I<O values were negatively associated with both BMI (β=−0.28, p=0.001) and PSQI scores (β=−0.29, p<0.001), the bootstrapping results indicated that the estimate of the indirect effect was −0.28, and the 95% confidence interval ranged from −0.68 to −0.05. For female shift-working nurses, sleep quality mediates the influence of the sleep-wake cycle on BMI, indicating that the maintenance of a regular sleep-wake cycle and good sleep quality could be important for female shift-working nurses.

Original languageEnglish
Pages (from-to)161-169
Number of pages9
JournalIndustrial Health
Volume58
Issue number2
DOIs
Publication statusPublished - Apr 2 2020

Keywords

  • Body mass index
  • Female
  • Shift-working nurse
  • Sleep quality
  • Sleep-wake cycle

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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