Characteristic Value Male/Female (% ratio) 170/110 (60.7%/39.3%) Age (years) 58.0 ± 11.7 PG I (ng/ml) 58.0 ± 36.9 PG II (ng/ml) 24.0 ± 15.2 PG I/ PG II ratio 3.0 ± 1.7 Anti H. pylori-IgG titer (U/ml) 49.0 ± 39.8 Anti H. pylori-IgG (positive) 244 (87.1%) Eradication history (none) 190 (67.8%) RUT (positive) 250 (89.3%) PCR (positive) 254 (90.7%) Culture (positive) 195 (69.6%)

Table 1: Patient characteristics. Values are presented as mean ± standard deviation PG I, pepsinogen I; PG II, pepsinogen II; RUT, rapid urease test