title: The association between shift work and unhealthy weight: a cross-sectional analysis from the Nurses and Midwives' e-cohort Study.
abstract: OBJECTIVE
  To examine the association between shift work and unhealthy weight among female nurses and midwives.
  
  
  METHODS
  A cross-sectional study. Measurement outcomes included shift work, unhealthy weight (underweight: body mass index [BMI] < 18.5; overweight: BMI 25.0 to 29.9; obesity: BMI > 30.0), diet quality, physical-activity level, alcohol consumption, and smoking status.
  
  
  RESULTS
  Among the 2494 participants (1259 day and 1235 shift workers), only 1% of the participants were underweight, 31.8% were overweight, and 26.9% were obese. After adjusting the selected confounders, shift workers were 1.15 times more likely to be overweight/obese than day workers (P = 0.013, 95% confidence interval, 1.03 to 1.28; P = 0.02, 95% confidence interval, 1.02 to 1.30, respectively).
  
  
  CONCLUSIONS
  Shift work is associated with higher risk of being overweight/obese. Longitudinal studies are being undertaken to better understand the causal relationship between shift work and unhealthy weight.
authors.affiliation: School of Nursing and Midwifery, University of Queensland, Brisbane, Australia. i.zhao@uq.edu.au
authors.forename: Isabella
authors.initials: I
authors.lastname: Zhao
authors.forename: Fiona
authors.initials: F
authors.lastname: Bogossian
authors.forename: Sarah
authors.initials: S
authors.lastname: Song
authors.forename: Catherine
authors.initials: C
authors.lastname: Turner
mesh_terms: D000328:Adult; D000368:Aged; D000428:Alcohol Drinking / Q000453:epidemiology; D003430:Cross-Sectional Studies; D004032:Diet; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D008880:Midwifery / Q000706:statistics & numerical data; D009043:Motor Activity; D009726:Nurses / Q000706:statistics & numerical data; D050177:Overweight / Q000453:epidemiology*; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology; D014940:Work Schedule Tolerance; D055815:Young Adult