Table 3.

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

Factors	No. of subjects in Hp positive group	No. of subjects in Hp negative group	Total	Prevalence	OR (95% CI)	P value
Smoking
No. of cigarettes smoked per day
0	2691	1535	4226	63.68%	1.00	1.000
1–10	191	108	299	63.88%	0.86 (0.68–1.09)	0.218
11–20	509	298	807	63.07%	1.19 (1.01–1.40)	0.036
>20	44	41	85	51.76%	0.80 (0.52–1.23)	0.321
The period of smoking (year)
0	2691	1535	4226	63.68%	1.00	1.000
0–10	186	105	291	63.92%	1.18 (0.92–1.52)	0.183
11–20	389	221	610	63.77%	1.14 (0.95–1.36)	0.152
>20	169	121	290	58.28%	0.88 (0.69–1.12)	0.286
Drinking	589	313	902	65.30%
Beer	15	14	29	51.72%
Beer consumption per day (mL/d)
0	3420	1968	5388	63.47%	1.00	1.000
0–200	4	4	8	50.00%	0.96 (0.23–4.04)	0.960
201–500	9	10	19	47.37%	2.17 (0.72–6.54)	0.170
>500	2	0	2	100.00%	0.58 (0.04–9.25)	0.699
The period of drinking beer (year)
0	3420	1968	5388	63.47%	1.00	1.000
0–10	10	9	19	52.63%	2.17 (0.72–6.54)	0.169
11–20	5	2	7	71.43%	0.77 (1.72–3.45)	0.734
>20	0	3	3	0.00%	1.74 (0.18–16.69)	0.633
Wine	577	301	878	65.72%
Wine consumption per day (g/d)
0	2858	1681	4539	62.97%	1.00	1.000
<250	480	248	728	65.93%	1.07 (0.90–1.25)	0.445
251–500	95	53	148	64.19%	0.96 (0.68–1.34)	0.791
>500	2	0	2	100.00%
The period of drinking wine (year)
0	2858	1681	4539	62.97%	1.00	1.000
0–10	186	110	296	62.84%	1.16 (0.90–1.48)	0.250
11–20	275	136	411	66.91%	1.04 (0.85–1.29)	0.686
>20	116	55	171	67.84%	0.90 (0.66–1.23)	0.521