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Table 2 Baseline characteristics of the patients stratified by ABC classification

From: Identification of Helicobacter pylori-related gastric cancer risk using serological gastritis markers and endoscopic findings: a large-scale retrospective cohort study

Group True A Pseudo A B C D
Total patients 273 87 518 515 114
 Endoscopic atrophy non/closed/open 273/0/0 0/26/61 44/163/311 2/28/485 3/4/107
 Person-years 1453.25 467.5 2560.75 2531.75 593.25
 Age, mean (SD) 53.6 (15.9) 69.7 (11.1) 62.2 (12.6) 64.9 (10.7) 69.2 (11.3)
 Follow-up months, mean (SD) 64.8 (57.6) 65.4 (72.3) 60.2 (60.9) 59.4 (54.0) 63.2 (62.4)
Gastric cancer 0 2 7 12 3
 Age, mean (SD) 0 71.5 (1.5) 63 (10.13) 66.1 (8.8) 72.7 (4.78)
 Person-years 0 2.75 25.25 68.75 14.5
 Follow-up months, mean (SD) 0 16.6 (16.1) 47.6 (33.4) 63.9 (73.0) 57.2 (29.1)
 Cases/incidence rate 0 0.00043 0.0027 0.005 0.0039
  1. SD standard deviation