Table 3.

Outcomes before Propensity-score Matched Analysis.

	GIE group (n=9,142)	X-ray group (n=3,978)	p
Hp infection, postive	5,056	-
post eradication	1,788	-
negative	2,298	-
Detection rate of all U-GI malignancies, n (%)	44 (0.48)	3 (0.08)	0.005*
Positive predictive value (95%CI) (%)	3.48 (2.60-4.63)	0.73 (0.25-2.13)	0.003*
Detection rate of gastric cancer, n (%)	34 (0.37)	3 (0.08)	0.003*
Stage I/II/III/IV	32/2/0/0	2/1/0/0
Treatment method (endoscopic/surgical)	31/3	1/2
Clinical outcome (curative/non-curative)	33/1	3/0
Detection rate of other U-GI malignancies, n (%)	10 (0.11)	0 (0.00)	0.036*
Hypopharyngeal cancer	2	0
Esophageal cancer	5	0
Duodenal cancer	2	0
Duodenal GIST	1	0
Treatment method (endoscopic/surgical/radiation)	5/3/1	0
Clinical outcome (curative/non-curative)	10/0	0
Adverse events	6 (0.07)	18 (0.45)	<0.0001*

Hp: Helicobacter pylori, U-GI: upper-gastrointestinal, SMT: submucosal tumor, *: student's t-test