Computed tomography radiogenomics: A potential tool for prediction of molecular subtypes in gastric stromal tumor

Table 4 Predictive performance of different model for KIT exon 11 codons 557-558 deletions

Models	ModelCT sign		ModelCT sign + rad		ModelCT sign + rad + clinic
Cohort	Training	Validation	Training	Validation	Training	Validation
AUC	0.667	0.610	0.842	0.782	0.872	0.795
Accuracy	0.522	0.500	0.689	0.700	0.720	0.766
Sensitivity	0.949	0.824	0.974	0.824	0.923	0.667
Specificity	0.385	0.396	0.598	0.660	0.656	0.796
NPV	0.959	0.875	0.986	0.927	0.964	0.886
PPV	0.330	0.304	0.437	0.438	0.462	0.500

CT: Computed tomography; AUC: Area under the curve; NPV: Negative predictive value; PPV: Positive predictive value.