title: Differences in hospitalizations between employment industries, Finland 1976 to 2010.
abstract: OBJECTIVE
  The aim of this study was to investigate the differences in hospitalizations between different industries in the Finnish working-age population between 1976 and 2010.
  
  
  METHODS
  Participants (n = 3,769,355) were randomly selected from seven independent consecutive national cohorts in the Statistics Finland population database, each representing a 25% sample of the working-age (18-65-year-old) population. These data were linked with diagnosis-specific records on hospitalizations, drawn from the National Hospital Discharge Registry (mean follow-up time per cohort was 4.1 years) using personal identification numbers.
  
  
  RESULTS
  Sociodemographics-adjusted models showed differences between the proportional hazard ratios of employment industries in all-cause hospitalization. These differences remained fairly stable (hazard ratio [HR], 0.95-1.24) throughout the 35-year period. The differences between industries varied the most in hospitalizations for mental disorders. These differences were substantial during 1976 to 1980 (HR, 1.16-2.29), decreased considerably and remained moderate between 1981 and 2000 (HR, 0.92-1.64), and then increased notably between 2001 and 2010 (HR, 1.09-2.34).
  
  
  CONCLUSIONS
  The cause-specific hospitalizations of different employment industries have varied, but the differences in all-cause hospitalizations have remained fairly stable, with the ranking among industries remaining almost the same over the past 35 years.
authors.affiliation: Centre of Expertise for the Development of Work and Organizations, Finnish Institute of Occupational Health, Tampere and Helsinki, Finland. Electronic address: lauri.kokkinen@ttl.fi.
authors.forename: Lauri
authors.initials: L
authors.lastname: Kokkinen
authors.affiliation: Department of Social Research, University of Helsinki, Helsinki, Finland; UKCRC Centre of Excellence for Public Health (Northern Ireland), Queen's University Belfast, Belfast, UK.
authors.forename: Anne
authors.initials: A
authors.lastname: Kouvonen
authors.affiliation: Centre of Expertise for the Development of Work and Organizations, Finnish Institute of Occupational Health, Tampere and Helsinki, Finland.
authors.forename: Aki
authors.initials: A
authors.lastname: Koskinen
authors.affiliation: Centre of Expertise for the Development of Work and Organizations, Finnish Institute of Occupational Health, Tampere and Helsinki, Finland.
authors.forename: Pekka
authors.initials: P
authors.lastname: Varje
authors.affiliation: Centre of Expertise for the Development of Work and Organizations, Finnish Institute of Occupational Health, Tampere and Helsinki, Finland.
authors.forename: Ari
authors.initials: A
authors.lastname: Väänänen
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D003953:Diagnosis-Related Groups / Q000639:trends; D005260:Female; D005387:Finland / Q000453:epidemiology; D054624:Health Status Disparities; D006760:Hospitalization / Q000639:trends*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology; D008875:Middle Aged; D009017:Morbidity / Q000639:trends; D016272:Occupational Health / Q000639:trends*; D009790:Occupations / Q000145:classification* / Q000639:trends; D010351:Patient Discharge / Q000639:trends; D016016:Proportional Hazards Models; D012042:Registries; D017678:Sex Distribution; D012959:Socioeconomic Factors; D055815:Young Adult
keywords: Employment industry; Hospitalization; Longitudinal studies