Does Helicobacter pylori eradication therapy for peptic ulcer prevent gastric cancer?

Table 3 Results of poisson regression analysis

	IRR
	Univariate	95% CI	P	Multivariate	95% CI	P
Eradication group	0.45	0.22-0.92	0.03	0.61	0.29-1.27	0.18
Non-eradication group	1.00			1.00
Sex
Male	1.00		0.05	1.00		0.03
Female	0.49	0.24-1.00		0.39	0.17-0.88
Age (yr)	1.09	1.05-1.12	< 0.01
< 60	1.00			1.00
60-70	3.22	1.74-5.95	< 0.01	2.59	1.37-4.91	< 0.01
> 70	5.18	2.69-10.0	< 0.01	4.23	2.09-8.53	< 0.01
Location of ulcer	0.69	0.40-1.19	0.18
Stomach/Stomach + duodenum	1.00			1.00
Duodenum	0.28	0.13-0.63	< 0.01	0.37	0.16-0.83	0.02
Unknown	1.16	0.16-8.43	0.88	1.69	0.23-12.48	0.61
Salt consumption	0.94	0.84-1.06	0.27
Restricted	1.00			1.00
No interest in salt consumption	0.43	0.16-1.11	0.08	0.65	0.25-1.73	0.39
Not restricted	0.78	0.43-1.41	0.41	1.03	0.56-1.90	0.93
Unknown	0.58	0.24-1.39	0.22	0.58	0.22-1.60	0.29
Smoking history	1.04	0.89-1.22	0.63
Non-smokers	1.00			1.00
Past smokers	1.56	0.74-3.29	0.25	0.97	0.43-2.20	0.95
Current smokers	0.94	0.50-1.76	0.85	0.78	0.38-1.61	0.50
Unknown	1.71	0.50-5.88	0.39	1.65	0.41-6.65	0.48

IRR: Incidence rate ratio.