Skip to main content

Table 2 Odds ratios* (ORs) and 95% confidence intervals (CI) for cancers of the biliary tract cancer and stones in relation to chronic typhoid infection, Shanghai China

From: Chronic typhoid infection and the risk of biliary tract cancer and stones in Shanghai, China

  Biliary Tract Cancer Biliary Stones
  Controlsa Total Gallbladder Extrahepatic Bile Duct Ampulla of Vater Controlsb Biliary Stones Gallbladder Stones Bile Duct Stones
Typhoid N N OR (95%CI) N OR (95%CI) N OR (95%CI) N OR (95%CI) N N OR (95%CI) N OR (95%CI) N OR (95%CI)
Total 859 457 262 140 55 654 977 728 249
Negativec 858 456 262 139 55 654 973 726 247
Positive          
   ≥1:160d 1 1 1.9 (0.1-31.1) 0 1 5.9 (0.4-95.2) 0 0 4 2 2
  1. *OR = odds ratio, adjusted for age and for level of education
  2. a N = 800 for gallbladder cancer controls due to exclusion of those with history of cholecystectomy
  3. b Controls with gallstones were excluded.
  4. c Negative defined as no hemagglutination at <160.
  5. d Positive defined as hemagglutination at ≥ 160.