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Table 4 Odds ratios for pancreatic cancer with 95% confidence intervals by Helicobacter pylori serology stratified for smoking status and alcohol consumption (no reference categories shown in table)

From: A prospective study of Helicobacter pylori in relation to the risk for pancreatic cancer

Factors Smoking status Alcohol consumption **
  Never smoker Current smoker Former smoker Low risk Intermediate risk High risk
  Cont Case* Cont Case* Cont Case* Cont Case* Cont Case* Cont Case*
H. pylori positive (n) 25 7 50 24 25 8 47 20 41 17 7 2
H. pylori negative (n) 63 6 65 31 35 11 82 15 72 25 7 5
H. pylori (crude) 2.94 (0.90–9.61) 1.01 (0.53–1.92) 1.02 (0.36–2.90) 2.33 (1.09–4.97) 1.19 (0.58–2.47) 0.40 (0.057–2.80)
H. pylori + age 2.95 (0.89–9.81) 1.01 (0.53–1.92) 1.01 (0.35–2.87) 2.31 (1.08–4.97) 1.20 (0.58–2.48) 0.42 (0.058–3.04)
H. pylori + sex 3.04 (0.91–10.18) 1.01 (0.53–1.93) 0.99 (0.35–2.86) 2.33 (1.09–4.98) 1.23 (0.59–2.55) 0.34 (0.048–2.46)
H. pylori + time to analysis 3.40 (0.99–11.72) 1.00 (0.52–1.91) 1.07 (0.37–3.08) 2.32 (1.08–4.96) 1.25 (0.60–2.61) 0.37 (0.052–2.69)
H. pylori + BMI*** 3.77 (1.05–13.48) 1.00 (0.52–1.92) 1.20 (0.41–3.53) 2.33 (1.09–4.97) 1.19 (0.57–2.46) 0.30 (0.035–2.61)
H. pylori + alcohol** 3.81 (1.06–13.63) 1.03 (0.53–1.99) 1.19 (0.39–3.61) - - -
H. pylori + smoking status - - - 2.13 (0.97–4.69) 1.29 (0.61–2.73) 0.29 (0.035–2.40)
H. pylori + all covariates 4.97 (1.23–20.10) 1.01 (0.52–1.97) 1.52 (0.45–5.10) 2.19 (0.98–4.88) 1.38 (0.64–2.98) 0.24 (0.023–2.48)
  1. *Controls/Cases
  2. **Alcohol consumption estimated by the Malmö modification of the Michigan Alcoholism Screening Test. OR in subjects with missing alcohol consumption data are not reported due to small number of controls (n = 7) and cases (n = 3).
  3. ***BMI, body mass index