The prognostic significance of human epidermal growth factor receptor family protein expression in operable pancreatic cancer

Table 4 Cox’s multiple regression analysis for survival time

Variable	Relative risk	95% confidence interval	P value
HER1 positive vs. negative	0.598	0.281–1.271	0.181
HER2 positive vs. negative	0.909	0.420–1.968	0.809
HER3 positive vs. negative	3.684	1.732–7.834	0.001
HER4 positive vs. negative	0.800	0.375–1.710	0.565
Stump cancer yes vs. no	10.110	2.725–37.506	0.001
Histopathology type Adenocarcinoma vs. non-adenocarcinoma	4.595	1.371–15.404	0.013
Differentiation poor vs. well	3.804	1.480–9.774	0.006
N stage N1 vs. N0	0.661	0.259–1.685	0.386
The positive lymph node number	1.331	0.964–1.838	0.083
CA199 >1200 U/ml vs. <1200 U/ml	1.961	0.806–4.770	0.138

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