Table III.

Predictors of OS in patients with pancreatic ductal adenocarcinoma after resection.

	OS (univariate)				OS (multivariate)
Variable	Number	Median ± SE	95% CI	Pa	RR	95% CI	Pb
Gender				0.006			0.920
Male	85	13.00±1.35	10.36–15.64		1.036	0.520–2.064
Female	54	18.90±6.99	5.20–32.60		1
Age (years)				0.842			0.613
≥65	43	12.30±3.85	4.75–19.85		1.193	0.603–2.358
<65	95	13.20±1.21	10.84–15.56		1
Tumor location				0.337			0.087
Head	79	13.70±2.85	8.12–19.29		1.699	0.926–3.119
Non-head	54	11.00±1.85	7.38–14.62		1
Tumor size (cm)				0.662			0.721
≥4	98	13.00±2.43	8.24–17.76		1.119	0.605–2.070
<4	39	15.00±3.08	8.97–21.03		1
Histological grade				0.535			0.284
G3–4	106	13.00±2.68	7.74–18.26		1.493	0.717–3.106
G1–2	19	14.30±2.35	9.70–18.90		1
T stage				0.060			0.051
T3	81	12.50±1.16	10.24–14.76		1.783	0.988–3.185
T1–2	56	16.80±2.99	10.93–22.76		1
N stage				0.004			0.189
N1	78	11.00±1.06	8.93–13.27		1.468	0.827–2.611
N0	54	18.90±2.92	13.56–24.24		1
PNI				0.409			0.245
Present	69	12.70±1.53	9.70–15.70		1.456	0.773–2.739
Absent	31	17.40±4.14	9.28–25.52		1
Nuclear WTAP expression				0.000			0.039
High	45	11.00±1.54	7.98–14.02		1.855	1.033–3.333
Low	83	18.80±3.09	12.75–24.85		1
Cytoplasmic WTAP expression				0.256			0.876
High	53	17.00±5.20	6.81–27.19		1.054	0.541–2.056
Low	75	12.70±1.43	9.90–15.50		1

^aLog-rank test

^bMultivariate Cox regression test. Total patient number does not equal 145 in all categories, as patient information was not available for all cases. OS, overall survival; SE, standard error; RR, relative risk; CI, confidence interval; G1, well-differentiated; G2, moderately-differentiated; G3, poorly-differentiated; G4, undifferentiated; T, tumor; N, lymph node; PNI, perineural invasion; WTAP, Wilms tumor 1-associated protein; 95% CI, 95% confidence interval; P, P-value.