title: Physical activity at work and the risk of chronic pancreatitis.
abstract: OBJECTIVE
  To examine the hypothesis that low social status in chronic pancreatitis is accounted for by high physical activity at work.
  
  
  METHODS
  A case-control study comparing 50 patients with an established diagnosis of chronic pancreatitis with 100 age- and sex-matched community controls.
  
  
  RESULTS
  There was a significant association between a high level of physical activity and chronic pancreatitis risk, the relative risk being 3.9 (1.3-11.7). After controlling for age, sex, smoking and alcohol intake, a high amount of calorie expenditure during work was still significantly associated with chronic pancreatitis risk, the relative risk being 4.5 (1.2-17.7). When social class was controlled for physical activity the increased risk for low social class status disappeared.
  
  
  CONCLUSIONS
  This study suggests that the social class gradient may be explained by the amount of manual labour.
authors.affiliation: Abteilung für Gastroenterologie, Medizinische Universitätsklinik, Essen, Germany.
authors.forename: B D
authors.initials: BD
authors.lastname: Breuer-Katschinski
authors.forename: J
authors.initials: J
authors.lastname: Bracht
authors.forename: S
authors.initials: S
authors.lastname: Tietjen-Harms
authors.forename: H
authors.initials: H
authors.lastname: Goebell
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000428:Alcohol Drinking / Q000453:epidemiology; D016022:Case-Control Studies; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000453:epidemiology*; D005082:Physical Exertion; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D012923:Social Class; D014937:Work