2.

Performance of three models

Model	C-index	95% CI	P	AIC
95% CI, 95% confidence interval; AIC, Akaike information criterion; *, C-indexes of texture signature and clinical nomogram were compared; **, C-indexes of clinical nomogram and combined nomogram were compared; ***, C-indexes of texture signature and combined nomogram were compared.
Texture signature	0.878	0.791−0.937	0.200*	85.52
Clinical nomogram	0.795	0.696−0.873	0.001**	110.00
Combined nomogram	0.936	0.863−0.977	0.030***	73.65