title: Correlates to sleepiness on night shift among male workers engaged in three-shift work in a chemical plant: its association with sleep practice and job stress.
abstract: The purpose of this study was to examine the correlation of sleepiness during night shift (SNS) in male shiftworkers with nonpharmacological self-management (nPSM) practices to facilitate good day sleep, and also with job stress. Sleepiness on the job and possible correlates to SNS among 157 male shiftworkers in a rotating three-shift schedule at a chemical plant were cross-sectionally investigated using a self-administered questionnaire. Multivariate analyses revealed that SNS was positively associated with drinking alcoholic beverages before day sleep, but inversely associated with subjective health status, being of the evening type, abstaining from caffeine before day sleep, having a bath before day sleep, job control, reward from work, feeling suited to the job, and support from colleagues. SNS correlated with certain nPSM practices and also with possible modifiers of job stress. These findings provide clues to developing countermeasures against SNS among shiftworkers. The effects of nPSM practices and job stress management on their day sleep and SNS should be examined in detail.
authors.affiliation: Department of Mental Health and Psychiatric Nursing, Oita University of Nursing and Health Sciences, Japan. kageyama@oita-nhs.ac.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kageyama
authors.forename: Toshio
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Ayano
authors.initials: A
authors.lastname: Abe-Gotoh
mesh_terms: D000328:Adult; D000428:Alcohol Drinking / Q000453:epidemiology; D002110:Caffeine / Q000008:administration & dosage; D002617:Chemical Industry; D003430:Cross-Sectional Studies; D006304:Health Status; D006801:Humans; D008297:Male; D017533:Marital Status; D010561:Personnel Staffing and Scheduling; D012648:Self Care; D020178:Sleep Disorders, Circadian Rhythm / Q000453:epidemiology*; D012894:Sleep Stages; D012907:Smoking; D013315:Stress, Psychological / Q000453:epidemiology*
chemical_list: D002110:Caffeine