Table 3.

Receiver operating characteristic (ROC) analysis for individual and combined amplification of the PIK3CA and SOX2 genes.

Characteristic	AUC	95% CI	p
PIK3CA gene amplification	0.657	0.517–0.797	0.039
SOX2 gene amplification	0.624	0.477–0.771	0.102
PIK3CA and SOX2 amplification	0.675	0.535–0.815	0.021

AUC: Area under the curve; 95% CI: 95% confidence interval (CI).