title: Night shift work and modifiable lifestyle factors.
abstract: OBJECTIVE
  Night shift work has been linked to some chronic diseases. Modification of lifestyle by night work may partially contribute to the development of these diseases, nevertheless, so far epidemiological evidence is limited. The aim of the study was to explore association between night shift work and lifestyle factors using data from a cross-sectional study among blue-collar workers employed in industrial plants in Łódź, Poland.
  
  
  METHODS
  The anonymous questionnaire was self-administered among 605 employees (236 women and 369 men, aged 35 or more) - 434 individuals currently working night shifts. Distribution of the selected lifestyle related factors such as smoking, alcohol drinking, physical activity, body mass index (BMI), number of main meals and the hour of the last meal was compared between current, former, and never night shift workers. Adjusted ORs or predicted means were calculated, as a measure of the associations between night shift work and lifestyle factors, with age, marital status and education included in the models as covariates.
  
  
  RESULTS
  Recreational inactivity (defined here as less than one hour per week of recreational physical activity) was associated with current night shift work when compared to never night shift workers (OR = 2.43, 95% CI: 1.13-5.22) among men. Alcohol abstinence and later time of the last meal was associated with night shift work among women. Statistically significant positive relationship between night shift work duration and BMI was observed among men (p = 0.029).
  
  
  CONCLUSIONS
  This study confirms previous studies reporting lower exercising among night shift workers and tendency to increase body weight. This finding provides important public health implication for the prevention of chronic diseases among night shift workers. Initiatives promoting physical activity addressed in particular to the night shift workers are recommended.
authors.affiliation: Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Łódź, Poland, beatap@imp.lodz.pl.
authors.forename: Beata
authors.initials: B
authors.lastname: Pepłońska
authors.forename: Weronika
authors.initials: W
authors.lastname: Burdelak
authors.forename: Jolanta
authors.initials: J
authors.lastname: Krysicka
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Bukowska
authors.forename: Andrzej
authors.initials: A
authors.lastname: Marcinkiewicz
authors.forename: Wojciech
authors.initials: W
authors.lastname: Sobala
authors.forename: Dorota
authors.initials: D
authors.lastname: Klimecka-Muszyńska
authors.forename: Marcin
authors.initials: M
authors.lastname: Rybacki
mesh_terms: D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D002940:Circadian Rhythm; D003430:Cross-Sectional Studies; D004522:Educational Status; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008019:Life Style; D008297:Male; D017533:Marital Status; D008875:Middle Aged; D011044:Poland; D012307:Risk Factors; D011795:Surveys and Questionnaires; D014940:Work Schedule Tolerance