title: Night-shift work and cardiovascular risk among employees of a public university.
abstract: OBJECTIVE
  To estimate the association between night-shift work and high cardiovascular risk.
  
  
  METHODS
  Cross-sectional study carried out with 211 workers of both genders, aged between 30 and 64 years, working on the health campus of a public university in the state of Minas Gerais, Brazil. Night-shift work was defined as a work shift between 7 pm and 7 am, and high cardiovascular risk was calculated based on the Framingham score. The association between night-shift work and high cardiovascular risk was estimated by the prevalence ratio (PR) and its 95% confidence interval (95% CI) after adjusting for potential confounding factors, calculated by Poisson regression.
  
  
  RESULTS
  Night-shift work was performed by 38.4% of the individuals, and high cardiovascular risk was diagnosed in 28% of the sample. Hypertension was more prevalent among night-shift compared with day-shift workers (p < 0.05). In the bivariate analysis, night-shift work, passive and high job strain categories at the demand-control scale, work time > 120 months, schooling > 9 years, family income > 6 minimum wages, level 2 abdominal obesity, and triglyceride levels > 150 mg/dL were associated with high cardiovascular risk (p < 0.05). After multivariate analysis, night-shift work remained independently associated with high cardiovascular risk (PR = 1.67; 95% CI = 1.10-2.54).
  
  
  CONCLUSIONS
  The prevalence of high cardiovascular risk was 67% higher among night-shift workers. This association should be considered when discussing the promotion of workers' health regarding changes in the work process.
authors.affiliation: Departament of Maternal-Child Nursing and Public Health, Nursing School, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil. adrianompimenta@yahoo.com.br
authors.forename: Adriano Marçal
authors.initials: AM
authors.lastname: Pimenta
authors.forename: Gilberto
authors.initials: G
authors.lastname: Kac
authors.forename: Rafaela Rocha Campos E
authors.initials: RR
authors.lastname: Souza
authors.forename: Luciana Maria de Barros Almeida
authors.initials: LM
authors.lastname: Ferreira
authors.forename: Salete Maria de Fátima
authors.initials: SM
authors.lastname: Silqueira
mesh_terms: D000328:Adult; D001938:Brazil / Q000453:epidemiology; D002318:Cardiovascular Diseases / Q000453:epidemiology*; D002940:Circadian Rhythm / Q000502:physiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D014495:Universities / Q000706:statistics & numerical data*; D014940:Work Schedule Tolerance / Q000502:physiology*; D000078329:Workforce