Table 2.

Sensitivity, specificity, and C-index of the classification performance of the four-gene signature in seven datasets.

GEO accession	TP	FP	FN	TN	Sensitivity (95% CI)	Specificity (95% CI)	C-index
GSE119217	122	0	0	12	1.00 (0.962–1.00)	1.00 (0.698–1.00)	1.00
GSE4607	68	1	1	14	0.986 (0.911–0.999)	0.933 (0.660–0.996)	0.958
GSE8121	30	0	0	15	1.00 (0.859–1.00)	1.00 (0.746–1.00)	0.989
GSE9692	30	1	0	14	1.00 (0.859–1.00)	0.933 (0.660–1.00)	0.980
GSE26378	81	0	1	21	0.988 (0.924–0.999)	1.00 (0.807–1.00)	0.961
GSE26440	98	1	0	31	1.00 (0.953–1.00)	0.969 (0.820–0.998)	0.978
GSE80496	24	0	0	21	1.00 (0.828–1.00)	1.00 (0.807–1.00)	1.00