Table 2

Prediction of ER status

Genes	Validation		Test
Genes	Correct^a	ROC area	Correct^b	ROC area
Top–100	47	100.00%	11	100.00%
51–150	43	97.80%	9	100.00%
101–200	45	99.30%	11	100.00%
151–250	44	97.50%	9	100.00%
201–300	41	93.70%	11	100.00%
251–350	39	95.30%	9	93.30%
301–400	41	93.10%	8	96.70%
Random	38.8 ± 0.2	91.8 ± 0.2%	5.5 ± 0.2	53.0 ± 2.6%

^a Number of correct classifications of 47 samples.
^b Number of correct classifications of 11 samples.