. Author manuscript; available in PMC: 2019 Nov 1.

Published in final edited form as: J R Stat Soc Ser C Appl Stat. 2018 Mar 15;67(5):1357–1378. doi: 10.1111/rssc.12272

Table 4.

Results from fitting Cox models M1, M2 and M3^†

Model	Predictors significant at 0.05	C-index 1 (Harrell et al., 1982)	C-index 2 (Gömen and Heller, 2005)
M1	Age, KPS	0.641	0.652
Clinical
M2	Age, KPS	0.722	0.728
Clinical + genetic	DDIT3, PIKC3A
M3	Age, KPS, DDIT3	0.859	0.841
Clinical + genetic + imaging	11 principal component shape coefficients

^†

Predictors significant at the 5% level are tabulated, and the two concordance indices are reported.