Anemia after gastrectomy for early gastric cancer: Long-term follow-up observational study

Table 1 Patients characteristics (n = 161)

Variable	Value n (%)
Age (yr)1	56.2 ± 10.9
Gender
Male	113 (70.2)
Female	48 (29.8)
Preoperative hemoglobin (g/dL)1	14.2 ± 1.1
Male	14.6 ± 0.9
Female	13.2 ± 0.8
Combined disease
Hypertension	20 (12.4)
Diabetes mellitus	19 (11.8)
Pulmonary disease	2 (1.2)
Coronary artery disease	2 (1.2)
Chronic liver disease	2 (1.2)
Type of operation
Billroth I subtotal gastrectomy	39 (24.2)
Billroth II subtotal gastrectomy	90 (55.9)
Total gastrectomy	32 (19.9)
Nodal Stage
N0	143 (88.8)
N1	15 (9.4)
N2	2 (1.2)
N3	1 (0.6)

¹Data are presented as mean ± SD.

Table 2 Biochemical marker after gastrectomy

	Before surgery	3 mo	6 mo	12 mo	18 mo	24 mo	36 mo	48 mo
Hemoglobin (g/dL)	14.2 ± 1.1	13.4 ± 1.2	13.3 ± 1.2a	13.4 ± 1.3	13.2 ± 1.3a	13.2 ± 1.4a	13.1 ± 1.5a	13.1 ± 1.6a
Serum ferritin (μg/L)		70.8 ± 59.1	63.9 ± 52.4a	55.2 ± 43.4a	49.3 ± 51.3a	43.3 ± 46.0a	34.7 ± 32.2a	33.7 ± 30.7a
Serum vitamin B12 (pg/mL)				1167.7 ± 597.6		1113.9 ± 629.4	773.7 ± 999.9c	560.3 ± 472.9c
Serum albumin (g/dL)	3.3 ± 0.4	4.2 ± 0.3	4.2 ± 0.4	4.3 ± 0.3	4.3 ± 0.3	4.3 ± 0.3	4.3 ± 0.3	4.3 ± 0.3

^aP < 0.05 vs 3 mo;

^cP < 0.05 vs 12 mo.