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Table 2 Likelihood of chronic pancreatitis with respect to age, gender and biliary disease stratified by smoking intensity (cigarettes per day) in a retrospective case control study

From: Cigarette smoking associated with chronic pancreatitis: a case control study in China

  Smoking intensity (cigarettes/d)   Smoking intensity (cigarettes/d)  
Variable < 20     ≥ 20    
OR 95.0% CI   P value OR 95.0% CI   P value
  Lower Upper    Lower Upper  
All subjects 0.779 0.424 1.431 0.421 1.595 0.979 2.598 0.061
Male 0.896 0.436 1.842 0.766 1.912 1.066 3.428 0.030*
Age ≥ 30 years 0.851 0.45 1.61 0.62 1.663 1.012 2.732 0.045*
Male, Age ≥ 30 years 0.966 0.463 2.015 0.927 2.023 1.112 3.68 0.021*
Male, Age ≥ 30 years, without biliary disease 0.926 0.371 2.311 0.87 2.11 0.951 4.684 0.066
  1. *have statistical significance Note: Age- and gender-matched healthy individuals were randomly selected from the PUMCH Medical Center as control group
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