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Table 2 Adjusted OR for cancers at upper, middle and lower third of the esophagus associated with seropositivity of H. pylori

From: Polymorphism in COX-2 modifies the inverse association between Helicobacter pyloriseropositivity and esophageal squamous cell carcinoma risk in Taiwan: a case control study

H. pylori infection Controls Location of ESCC Total cases
   Upper + Middle lower   
  No. (%) No. (%) AOR1 (95% CI) No. (%) AOR1 (95% CI) No. (%) AOR1 (95% CI)
Negative 92 (47) 76 (62) 1.0 38 (66) 1.0 114 (63) 1.0
Positive 102 (53) 46 (38) 0.6 (0.3 – 1.1) 20 (34) 0.5 (0.2 – 1.0) 66 (37) 0.5 (0.3 – 0.9)
  1. 1 Odds ratios were adjusted for the covariates (age, gender, education level, pack-years of cigarette smoking and of betel quid chewing, and drink-years of alcohol drinking) listed in Table 1.