Table 1 Characteristics of the 255 patients at the initial endoscopic treatment and multivariate analysis* as predictors for subsequent gastric cancer.

Characteristic		Hazard ratio	95% CI	p Value§
No of patients	255
Male sex	183 (71.8%)	1.11	0.52–2.39	0.79
Age (years) (mean (SD))	67.9 (9.2)	1.54‡	1.07–2.21	0.02
Histology
Adenoma	56	0.98	0.48–2.00	0.95
Carcinoma†	199
Synchronous multiplicity
Solitary	236 (92.5%)
Multiple	19 (7.5%)	4.10	1.92–8.79	<0.01
Adenomas	2
Adenoma and carcinoma	8
Carcinomas	9
Surveillance period (months) (mean (SD))	51.6 (34.9)

*The Cox proportional hazard model was used.

†Carcinoma was taken as the representative histology of the case when the patient had multiple neoplasias of both carcinoma and adenoma.

‡Increment of 10 years.

§p values were calculated using the Wald test.