Gastric cancer, Helicobacter pylori infection and other risk factors

Table 1 Randomized controlled trial with gastric cancer incidence as primary outcome measure

Study	Province, Country	Gastric cancer incidence in the general population	No. of patients randomized (treatment/control)	Follow up	No. of patients with gastric cancer (treatment/control)
Wong et al[56]	Fujian, China	99 cases per 100 000 persons per year	817/813	7.5 yr	7/11 (0.9%/1.4%)
Fukase et al[57]	Japan	62 cases per 100 000 persons per year	272/272	3 yr	9/24 (3.3%/8.8%)

Table 2 Baseline histology of RCTs with gastric cancer incidence as primary outcome measure

Study	Baseline histology
	Gastritis	Atrophy	Intestinal metaplasia	Dysplasia	Early gastric cancera
Wong et al[56]	+	+	+	+	-
Fukase et al[57]	-	+	+	-	+

^aEarly gastric cancer either newly diagnosed and planning to have endoscopic treatment or in post-resection follow-up. +: Included; -: Not included.