Table 3: Relationships between prevalence of H. pylori infection and smoking and alcohol drinking.

FactorsNo. of subjects in Hp positive groupNo. of subjects in Hp negative groupTotalPrevalenceOR (95% CI)P value

Smoking
No. of cigarettes smoked per day
 026911535422663.68%1.00 1.000
 1–1019110829963.88%0.86 (0.68–1.09)0.218
 11–2050929880763.07%1.19 (1.01–1.40)0.036
 >2044418551.76%0.80 (0.52–1.23)0.321
The period of smoking (year)
 026911535422663.68%1.00 1.000
 0–1018610529163.92%1.18 (0.92–1.52)0.183
 11–2038922161063.77%1.14 (0.95–1.36)0.152
 >2016912129058.28%0.88 (0.69–1.12)0.286

Drinking 58931390265.30%
Beer15142951.72%
 Beer consumption per day (mL/d)
  034201968538863.47%1.00 1.000
  0–20044850.00%0.96 (0.23–4.04)0.960
  201–5009101947.37%2.17 (0.72–6.54)0.170
  >500202100.00%0.58 (0.04–9.25)0.699
 The period of drinking beer (year)
  034201968538863.47%1.00 1.000
  0–101091952.63%2.17 (0.72–6.54)0.169
  11–2052771.43%0.77 (1.72–3.45)0.734
  >200330.00%1.74 (0.18–16.69)0.633
Wine57730187865.72%
 Wine consumption per day (g/d)
  028581681453962.97%1.00 1.000
  <25048024872865.93%1.07 (0.90–1.25)0.445
  251–500955314864.19%0.96 (0.68–1.34)0.791
  >500202100.00%
 The period of drinking wine (year)
  028581681453962.97%1.00 1.000
  0–1018611029662.84%1.16 (0.90–1.48)0.250
  11–2027513641166.91%1.04 (0.85–1.29)0.686
  >201165517167.84%0.90 (0.66–1.23)0.521