Table 2.

Univariate analysis of OS and DFS

Varibles	OS(SIPTW)		DFS(SIPTW)
	HR.CI95	P	HR.CI95	P
Age	1.02(1.01–1.03)	0.001	1.01(1.00–1.02)	0.020
Sex
Female	Reference
Male	0.94(0.75–1.19)	0.612	0.88(0.71–1.09)	0.228
BMI	0.96(0.92–0.99)	0.036	0.98(0.95–1.02)	0.273
Group
INHA	Reference		Reference
TIVA	1.18(0.93–1.50)	0.170	1.07(0.85–1.36)	0.561
Smoke
No	Reference		Reference
Yes	1.12(0.89–1.42)	0.341	0.90(0.73–1.13)	0.376
Drink
No	Reference		Reference
Yes	1.02(0.77–1.34)	0.902	0.90(0.70–1.18)	0.451
Hypertension
No	Reference		Reference
Yes	1.12(0.83–1.51)	0.461	0.93(0.71–1.22)	0.584
Diabetes
No	Reference		Reference
Yes	0.83(0.57–1.20)	0.317	0.81(0.58–1.13)	0.215
Adjuvant treatment
No	Reference		Reference
Yes	0.65(0.50–0.85)	0.001	0.65(0.51–0.84)	< 0.001
Blood transfusion
No	Reference		Reference
Yes	1.22(0.97–1.54)	0.091	1.32(1.06–1.65)	0.015
Duration	1.17(1.07–1.28)	0.001	1.12 (1.03–1.23)	0.008
ASA
I	Reference		Reference
II	1.78(0.83–3.81)	0.141	2.19(1.04–4.60)	0.039
III	4.67(1.74–12.51)	0.002	7.23(3.08–16.93)	< 0.001
Tumour location
Head	Reference		Reference
Tail	0.78(0.59–1.03)	0.077	0.98(0.756–1.26)	0.856
Cancer stage
I	Reference		Reference
II	0.99(0.78–1.27)	0.965	1.21(0.97–1.52)	0.098
III	1.18(0.75–1.84)	0.475	1.59(0.99–2.55)	0.057
Surgery type
Distal pancreatectomy	Reference		Reference
Other	1.13(0.19–6.60)	0.896	0.73(0.15–3.58)	0.700
Pancreaticoduodenectomy	1.34(0.74–1.76)	0.033	1.11(0.86–1.43)	0.440
Degree of differentiation
Poor	Reference		Reference
Well	0.71(0.56–0.91)	0.006	0.71(0.57–0.89)	0.003

Abbreviations:OS Overall survival, DFS Disease-free survival, SIPTW Stabilized inverse probability of treatment weighting, HR Hazard ratio CI Confidence interval, ASA American Society of Anesthesiologists