. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: J Urol. 2014 Sep 18;193(3):776–782. doi: 10.1016/j.juro.2014.09.020

Table 5.

C-indices for the base model, the base model plus number of nodules, and the base model plus size of nodules for all patients (N=748) and for patients with indeterminate pulmonary nodules (N=382). The base model is a multivariable Cox model adjusted for American Joint Committee on Cancer stage, histology, and tumor size. All c-indices are corrected by cross validation.

	Lung Metastases	Any Distant Metastases	Death from Kidney Cancer
For all patients (N=748)
Base model	0.831	0.821	0.799
Base model + size of nodules	0.839	0.828	0.799
Base model + number of nodules	0.830	0.819	0.794
For patients with indeterminate pulmonary nodules (N=382)
Base model	0.833	0.816	-^*
Base model + size of nodules	0.850	0.823	-^*
Base model + number of nodules	0.830	0.813	-^*

No comparison was done for death from kidney cancer among patients with indeterminate pulmonary nodules due to a limited number of events.