Overexpression of proteasomal activator PA28α serves as a prognostic factor in oral squamous cell carcinoma

Table 1 Univariate Cox Regression analysis on factors for OSCC recurrence

Variables	β	SE	Wald χ ²	P Value	RR (95 % CI)^a
Alpha domain	0.543	0.240	5.111	0.024	1.722 (1.075-2.758)
Alpha intensity	0.868	0.245	12.864	0.000	2.382 (1.472-3.854)
Alpha (D×I)	0.256	0.064	15.889	0.000	1.292 (1.139-1.466)
Alpha (categorical)	1.298	0.307	17.923	0.000	3.664 (2.008-6.683)
Smoking	1.210	0.326	13.812	0.000	3.354 (1.772-6.349)
Current smoking	0.940	0.362	6.754	0.009	2.560 (1.260-5.200)
Smoking dose	0.001	0.000	4.943	0.026	1.001 (1.000-1.002)
Differentiation (3 vs. 1)	1.567	0.367	18.230	0.000	4.792 (2.334-9.837)
T-stage (3 vs. 1)	1.848	0.551	11.250	0.001	6.349 (2.156-18.698)
Lymphatic metastasis	0.704	0.302	5.420	0.020	2.021 (1.118-3.656)
Clinical stage (3 vs. 1)	1.737	0.746	5.422	0.020	5.679 (1.316-24.501)
Clinical stage (4 vs. 1)	2.230	0.762	8.570	0.003	9.300 (2.090-41.387)