Table 2:

Multivariable cox proportional hazard model for progression-free survival and overall survival.

Covariate	N	Hazard ratio (95% CI)	P
Progression-free survival*
MAP score	134	1.01 (0.85–1.20)	0.926
IVC tumor thrombus
Yes	65	1.55 (0.98–2.47)	0.061
No	76	–	–
Received systemic therapy
Yes	46	–	–
No	88	0.28 (0.18–0.46)	<0.001
Corrected calcium	134	1.38 (0.98–1.94)	0.064
Overall survival**
MAP score	141	1.01 (0.84–1.21)	0.917
IVC tumor thrombus
Yes	65	2.05 (1.23–3.39)	0.006
No	76	–	–

MAP, Mayo Adhesive Probability; IVC, Inferior vena cava; ECOG, Eastern Cooperative Oncology Group; BMI, Body mass index. *Backward selection with an alpha level of removal of 0.1 was used. The following variables were removed from the model: Age at the Surgery, BMI, clear_cell, ECOG PS at presentation, Gender, Race, and Side of kidney. **Backward selection with an alpha level of removal of 0.1 was used. The following variables were removed from the model: Age at the Surgery, BMI, clear_cell, ECOG PS at presentation, Gender, Race, Ever received systemic therapy, and Side of Kidney.