Prognostic analysis of patients with pancreatic head adenocarcinoma less than 2 cm undergoing resection

Table 2 Univariate analysis of factors influencing the overall survival of the 35 small pancreatic head cancer patients undergoing resection

Factors	Survival time (mo)				P
	Median (mo)	Mean (mo)	3-yr (%)	5-yr (%)
Gender					0.8417
Male (n = 21)	13.0	24.0	28.1	0
Female (n = 14)	14.0	27.9	23.4	11.7
Age (yr)					0.2931
≤ 60 (n = 13)	24.6	26.4	35.9	12.0
> 60 (n = 22)	9.4	8.06-10.75	17.02	12.61
Physical examination					0.9566
Positive (n = 31)	13.0	28.1	26.7	8.0
Negative (n = 4)	16.1	22.5	25.0	0
Bilirubin (mg/dL)					0.5049
≤ 2 (n = 8)	14.0	15.6	14.3	0
> 2 (n = 27)	16.1	29.4	39.6	7.7
Albumin (g/dL)					0.0002
≤ 3.5 (n = 13)	5.9	7.6	0	0
> 3.5 (n = 22)	16.6	32.7	33.6	11.2
Serum CEA (ng/mL)					0.6741
≤ 5 (n = 24)	16.6	22.4	23.6	7.9
> 5 (n = 11)	9.1	19.8	25.0	15.42
Serum CA 19-9 (IU/L)					0.7592
≤ 37 (n = 11)	16.6	19.4	11.1	11.1
> 37 (n = 24)	14.0	23.5	33.6	0
Operative procedure					0.6500
Whipple (n = 30)	16.1	27.9	28.8	7.2
PPPD (n = 5)	14.0	15.5	0	0
Portal vein invasion					0.1467
Positive (n = 2)	4.0	9.0	0	0
Negative (n = 33)	16.1	28.0	28.1	7.0
Resection margin					0.6704
Positive (n = 10)	10.9	19.5	30.0	0
Negative (n = 25)	16.1	28.8	26.4	7.9
TNM staging					0.0931
I + II (n = 13)	16.6	40.2	50.0	15.0
III + IV (n = 22)	13.0	17.6	14.4	0
Tumor differentiation					0.3202
W-D (10)	23.1	22.9	50.0	0
M-D (19)	10.8	21.5	17.9	6.0
P-D (6)	16.1	32.2	50.0	25.0
Post-operative CT					0.7114
With (n = 23)	16.1	23.9	25.3	0
Without (n = 12)	10.8	28.8	27.8	13.9
Post-operative RT					0.9385
With (n = 1)	24.6	24.6	0	0
Without (n = 24)	14.0	24.6	27.4	6.9

IU: International unit; PPPD: Pylorus-preserving pancreaticoduodenectomy.