Table 2.

Multivariate Cox regression analyses of overall survival using selected features based on AUC2 and baseline features.

	Selected features	p Value	HR	95% CI
AUC2	Density	<0.000	0.067	0.021–0.220
	Skewness of positive pixel value	0.010	5.142	1.490–17.747
	Entropy at inner	0.001	6.196	2.086–18.406
Baseline	M descriptor	0.338	1.806	0.538–6.057
	Kurtosis of positive pixel value	<0.000	7.992	2.759–23.148
	Surface area	0.001	0.192	0.075–0.493

Note. ^__ CI, confidence interval; HR, hazard ratio.