Table 2.

Univariable Cox regression analysis in the lung 1 training set

Feature	Hazard ratio	p-value	Concordance
Original shape voxel volume	1.000e + 00 (1.00–1.00)	4.55e-06 ***	0.583 (se = 0.016)
Original shape major axis length	1.005061 (1.002–1.008)	0.000511 ***	0.582 (se = 0.016)
Original shape elongation	0.7160 ( 0.3848–1.332)	0.292	0.517 (se = 0.017)
Original gldm large dependence emphasis	1.003723 (1.001–1.006)	0.00109 **	0.571 (se = 0.016)
Original first-order energy	1.000e + 00 (1.00–1.00)	0.00102 **	0.564 (se = 0.017)
Original first-order minimum	1.0004024 (0.9994–1.001)	0.438	0.485 (se = 0.016)
Wavelet HLL glcm correlation	0.1036 (0.02072–0.5175)	0.00574 **	0.549 (se = 0.016)
Wavelet HLL glszm GrayLevelNonUniformityNormalized	343.630 (13.11–9006)	0.000458 ***	0.551 (se = 0.016)
Wavelet LHL glcm MCC	3.4081 (1.102–10.54)	0.0332 *	0.525 (se = 0.016)
Wavelet LHL first-order skewness	0.77914 (0.6632–0.9154)	0.00241 **	0.557 (se = 0.016)
Wavelet LHL ngtdm strength	0.93152 (0.8665–1.001)	0.0545	0.571 (se = 0.017)
Wavelet LHH first-order skewness	0.98459 (0.6937–1.398)	0.931	0.499 (se = 0.017)
Wavelet LHH first-order mean	0.88519 (0.7761–1.01)	0.0692	0.531 (se = 0.016)
Wavelet LLH glcm ClusterShade	1.000e + 00 (0.9999–1)	0.00642 **	0.545 (se = 0.016)
Wavelet LLH first-order maximum	1.0005368 (1.00–1.001)	0.00134 **	0.565 (se = 0.016)

^* < 0.05, ** < 0.01, *** < 0.001