Table 4.

Cox proportional hazard estimation in 82 patients for whom staining results for CXCR2, SOCS-3, IL-8 and p-STAT-3 were available using a stepwise backward selection strategy.

Parameter	HR	Pa	95% Confidence interval of HR
CXCR2 expression	1.861	0.035	1.045	3.314
Surgery (partial versus almost complete)	0.529	0.019	0.310	0.901
Radiotherapy (absence versus presence)	0.402	0.028	0.178	0.904
Histological grade	6.379	<0.001	2.566	15.856

^aSignificant at P < 0.05.