Table 1.

Characteristics of study subjects.

Baseline	HC group (n = 60)	AG group (n = 68)	GC group (n = 135)	P
Age (yr)	64.55 ± 13.32	62.56 ± 11.55	64.79 ± 12.36	.464
Gender				.237
Female	33	35	58
Male	27	33	77
Sirt6 (ng/mL)	35.01 ± 7.30	25.13 ± 6.84	19.09 ± 5.36	<.001
CEA (ng/mL)	2.15 ± 1.15	3.56 ± 1.50	3.89 ± 1.59	<.001
CA 19-9 (U/mL)	14.04 ± 4.46	14.60 ± 3.94	17.81 ± 4.79	<.001
CA 72-4 (IU/mL)	5.37 ± 1.43	7.11 ± 1.60	8.43 ± 2.18	<.001
CA 125 (IU/mL)	33.49 ± 14.03	36.96 ± 9.49	38.42 ± 7.42	.006
CA 50 (µg/L)	21.99 ± 4.76	22.93 ± 4.96	25.44 ± 4.66	<.001

AG = atrophic gastritis, CA 19-9 = carbohydrate antigen 19-9, CA 72-4 = carbohydrate antigen 72-4, CEA = carcino-embryonic antigen, Sirt6 = sirtuin 6.