Pancreas-sparing duodenectomy with regional lymph node dissection for early-stage ampullary carcinoma: A case control study using propensity scoring methods

Table 1 Patient characteristics between study groups

Characteristic	PD group	PSD group	P value
	(n = 69)	(n = 69)
Age (yr)	58.5 (41-79)	62.1 (39-78)	0.765
Gender, male, n (%)	36 (52.3)	38 (55.1)	0.681
Preoperative laboratory results
Hemoglobin (g/dL)	11.7 (9.0-14.3)	11.0 (9.3-14.5)	0.663
Total bilirubin (mg/dL)	7.1 (0.9-14.8)	7.6 (0.6-15.1)	0.701
Serum albumin (g/L)	3.5 (2.3-5.6)	3.7 (2.4-5.3)	0.913
CA19-9 (ng/mL)	33.8 (0.1-491)	37.1 (0.1-463)	0.594
CEA (ng/mL)	1.8 (0.1-30.2)	2.0 (0.1-31)	0.787
Past medical history, n (%)
Hypertension	21 (30.4)	23 (33.3)	0.604
Coronary artery disease	15 (21.7)	13 (18.8)	0.837
Diabetes mellitus	8 (11.6)	9 (13.0)	0.694
History of alcohol abuse	6 (8.7)	7 (10.1)	0.668
History of tobacco use	17 (24.6)	19 (27.5)	0.917
Myocardial infarction	5 (7.2)	4 (5.8)	0.857
Peripheral vascular disease	4 (5.8)	4 (5.8)	0.793
COPD	2 (2.9)	3 (4.3)	0.634

Data are expressed as number of patients or median (range). ERCP: Endoscopic retrograde cholangiopancreatography; EUS: Endoscopic ultrasound; COPD: Chronic obstructive pulmonary disease; CA19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; PD: Pancreaticoduodenectomy; PSD: Pancreas-sparing duodenectomy.