TABLE 2.

Demographic variables of matched cases and controls with different diagnoses

	Patients for ChAG risk analysis			Patients for GC risk analysis
Variable	NAG*†	ChAG*‡	P value	NAG**	GC**§	P value
Subjects (n)	86	43		133	133
Sex [male/female (%/%)]	52/34 (60.5/39.5)	26/17 (60.5/39.5)	1.0	61/72 (45.9/54.1)	61/72 (45.9/54.1)	1.0
Mean age ± SD (y)	64.0 (14.43)	67.2 (12.73)	0.85	61.4 (14.84)	64.0 (14.76)	0.2
H. pylori infection (%)	88.4	76.7	0.12	88.0	74.4	0.006
Hospital
Loyaza	63 (73.3)	28 (65.1)		96 (72.2)	80 (60.2)
INEN	23 (26.7)	15 (34.9)	0.41	37 (27.8)	53 (39.8)	0.052
Location
Antrum	61 (70.9)	36 (83.7)		95 (71.4)	70 (52.6)
Corpus	25 (29.1)	7 (16.3)	0.09	38 (28.6)	63 (47.4)	0.002

^*Controls are matched 2:1

^**(1:1) to cases according age (± < 10 years), sex, and environmental risk factors.

^†Nonatrophic gastritis.

^‡Chronic atrophic gastritis.

^§Gastric cancer.