A novel radiomics based on multi-parametric magnetic resonance imaging for predicting Ki-67 expression in rectal cancer: a multicenter study

Table 6 The ROC analysis of the different models

Cohort	Model	Accuracy	AUC(95%CI)	Sensitivity	Specificity	PPV	NPV
Training	Radscore	0.81	0.83 (0.747–0.903)	0.83	0.76	0.90	0.62
	Clinical	0.74	0.75 (0.646–0.853)	0.76	0.68	0.87	0.51
	Combined	0.84	0.86 (0.794–0.928)	0.84	0.73	0.90	0.61
In-valid	Radscore	0.83	0.85 (0.751–0.942)	0.85	0.79	0.93	0.61
	Clinical	0.80	0.81 (0.702–0.924)	0.80	0.79	0.93	0.55
	Combined	0.88	0.90 (0.826–0.976)	0.87	0.93	0.98	0.68
Ex-valid	Radscore	0.78	0.80 (0.673–0.919)	0.78	0.79	0.92	0.52
	Clinical	0.72	0.72 (0.533–0.911)	0.74	0.64	0.87	0.43
	Combined	0.85	0.86 (0.749–0.971)	0.85	0.86	0.95	0.63

ISSN: 1471-2342