Standard vs magnifying narrow-band imaging endoscopy for diagnosis of Helicobacter pylori infection and gastric precancerous conditions

Table 1 Baseline characteristics of the study population

Characteristic	n = 254
Age (yr, mean ± SD)	45.9 ± 14.6
Sex, male, n (%)	119 (46.9)
Indication for endoscopy, n (%)
Screening	132 (52.0)
Dyspepsia	42 (16.5)
Abdominal pain	47 (18.5)
Other	33 (13.0)
Endoscopic diagnosis, n (%)
Peptic ulcer	11 (4.3)
Gastric neoplasia	25 (9.8)
Non-neoplastic polyp	19 (7.5)
Chronic active gastritis	135 (53.1)
Helicobacter pylori infection, n (%)	163 (64.2)
Gastric atrophy, n (%)
None/mild	117 (66.9)
Moderate	37 (21.1)
Severe	21 (12.0)
Intestinal metaplasia, n (%)
None	115 (65.7)
Antrum only	22 (12.6)
Corpus	38 (21.7)
Serum PG (ng/mL, mean ± SD)
PG I	64.4 ± 32.4
PG II	20.5 ± 14.7
PG I/II ratio	4.11 ± 2.2
Serum gastrin (pg/mL, mean ± SD)	123.1 ± 149.9

SD: Standard deviation; PG: Pepsinogen.