title: Correlation of shift work and waist circumference, body mass index, chronotype and depressive symptoms.
abstract: OBJECTIVE
  Correlate shift work with body mass index (BMI), waist circumference, chronotype and depressive symptoms.
  
  
  METHODS
  This study comprising 14 shift workers and 13 day workers. Subjects were workers from the health area aged 25 to 60 years. Minor psychiatric disorders were accessed by Self Report Questionnaire (SRQ-20) and depressive symptoms by Beck Depression Inventory (BDI). Chronotype was accessed using Morningness-Eveningness Questionnaire (MEQ). Anthropometric measures were taken.
  
  
  RESULTS
  Shift workers presented higher BMI (P = 0.03) and waist circumference (P = 0.004) than day workers. Years on shift work were significantly correlated to waist circumference (r = 0.43; P = 0.03) and age (r = 0.47; P = 0.02). Shift work was not correlated with depressive symptoms and chronotype.
  
  
  CONCLUSIONS
  These results may suggest a role played by shift work on the development and/or the early clinic manifestations of metabolic disturbances, becoming a risk factor to metabolic syndrome.
authors.affiliation: School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. lc-antunes@hotmail.com
authors.forename: Luciana da Conceição
authors.initials: Lda C
authors.lastname: Antunes
authors.forename: Manoela Neves da
authors.initials: MN
authors.lastname: Jornada
authors.forename: Letícia
authors.initials: L
authors.lastname: Ramalho
authors.forename: Maria Paz Loayza
authors.initials: MP
authors.lastname: Hidalgo
mesh_terms: D000328:Adult; D001683:Biological Clocks / Q000502:physiology; D015992:Body Mass Index; D002940:Circadian Rhythm / Q000502:physiology*; D003863:Depression / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000209:etiology; D008875:Middle Aged; D012307:Risk Factors; D012890:Sleep / Q000502:physiology*; D018709:Statistics, Nonparametric; D055105:Waist Circumference / Q000502:physiology*; D014937:Work / Q000145:classification* / Q000502:physiology; D014940:Work Schedule Tolerance / Q000502:physiology