Lymph node ratio and preoperative CA 19-9 levels predict overall survival and recurrence-free survival in patients with resected pancreatic adenocarcinoma

Table 1 Patient demographics n (%)

Gender
Female	78 (46.2)
Male	91 (53.8)
Ethnicity
African American	8 (4.7)
Caucasian	146 (86.4)
Unknown	15 (8.9)
Tumor location
Head	151 (89.3)
Body/tail	18 (10.7)
Operation type
Whipple	150 (88.8)
Distal pancreatectomy	12 (7.1)
Total pancreatectomy	5 (2.9)
En bloc resection	2 (1.2)
Adjuvant therapy
Chemoradiation	72 (42.6)
Chemotherapy	33 (19.5)
Radiation	3 (1.8)
None	50 (29.6)
Unknown	11 (6.5)
Age at surgery (yr) (n = 169)	67.1 (57.2-73.0)1
Followup range (m) (n = 169)	0.13-156.6

The total number of patients is 169.

¹Median (interquartile range).