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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.