Table 2

Characteristics of the four groups categorised by positivity or negativity for serum Helicobacter pylori antibody and gastric atrophy determined by serum pepsinogen level

Group	H pylori antibody	Pepsinogen	n	Male	Female^2-150	Age^2-160 (mean (SD))	PG I^2-160 (mean (SD))	PG I/II^2-160 (mean (SD))
A	−	Normal	2703	1767	936	46.0 (8.4)	53.5 (24.4)	6.3 (1.8)
B	+	Normal	1811	1191	620	48.6 (8.5)	72.5 (29.7)	4.2 (1.5)
C	+	Low	884	541	343	51.7 (8.8)	41.7 (17.2)	2.0 (0.7)
D	−	Low	334	233	101	52.3 (9.6)	35.4 (18.5)	1.9 (0.7)

PG I, serum pepsinogen I level (ng/ml); PG I/II, pepsinogen I/II ratio, serum pepsinogen I (ng/ml)/pepsinogen II (ng/ml).
↵2-150 p<0.05 by χ² test;
↵2-160 p<0.01 by ANOVA.