title: Pancreatitis and pancreatic cancer in two large pooled case-control studies.
abstract: OBJECTIVE
  The association between duration of pancreatitis and pancreatic cancer has not been well characterized in large population-based studies. We conducted detailed analyses to determine the association between pancreatitis onset and pancreatic cancer risk.
  
  
  METHODS
  Data from two case-control studies of pancreatic cancer (n = 4515) in the San Francisco Bay Area and the M.D. Anderson Cancer Center were pooled for analysis (1,663 cases, 2,852 frequency-matched controls). Adjusted odds ratios (OR) were estimated using a random-effects model. Results In the pooled multivariable model, history of pancreatitis was associated with a 7.2-fold increased risk estimate for pancreatic cancer [95% confidence interval (CI): 4.0, 13]. The risk estimate was nearly 10-fold in participants aged <55 years (OR = 9.9, 95% CI: 3.5, 28). A shorter temporal history of pancreatitis was more closely associated with pancreatic cancer than was a longer temporal history: <3 years (OR = 29, 95% CI: 12, 71), 3-10 years (OR = 2.6, 95% CI: 1.5, 5.6), and >10 years (OR = 1.8, 95% CI: 0.7, 4.5, p trend < 0.001).
  
  
  CONCLUSIONS
  A short temporal history of pancreatitis was highly associated with pancreatic cancer, suggesting that pancreatitis may be an early manifestation of pancreatic cancer in some individuals. Pancreatic cancer should be considered in the differential diagnosis of individuals with an episode of pancreatitis.
authors.affiliation: Department of Epidemiology and Biostatistics, School of Medicine, University of California, 3333 California St. Suite 280, San Francisco, CA 94143, USA. paige.bracci@ucsf.edu
authors.forename: Paige M
authors.initials: PM
authors.lastname: Bracci
authors.forename: Furong
authors.initials: F
authors.lastname: Wang
authors.forename: Manal M
authors.initials: MM
authors.lastname: Hassan
authors.forename: Samir
authors.initials: S
authors.lastname: Gupta
authors.forename: Donghui
authors.initials: D
authors.lastname: Li
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Holly
mesh_terms: D000230:Adenocarcinoma / Q000150:complications*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D010190:Pancreatic Neoplasms / Q000150:complications*; D010195:Pancreatitis / Q000150:complications*; D012307:Risk Factors