Table 1.

Recursive feature selection: 10 fold cross-validated repeated 5 times.

Variables	ROC	Sens	Spec	ROCSD	SensSD	SpecSD	Selected
1	0.792	0.507	0.802	0.228	0.360	0.169
2	0.819	0.597	0.845	0.177	0.347	0.148
3	0.843	0.620	0.888	0.170	0.332	0.130
4	0.817	0.623	0.875	0.179	0.331	0.135
5	0.827	0.573	0.867	0.169	0.339	0.139
6	0.831	0.570	0.872	0.171	0.375	0.131
7	0.842	0.543	0.878	0.166	0.392	0.136
8	0.844	0.543	0.868	0.169	0.379	0.152	*
142	0.809	0.417	0.891	0.196	0.327	0.149
1092	0.758	0.293	0.929	0.207	0.291	0.120

ROCSD, standard deviation of ROC; SenSD, standard deviation of Sensitivity; SpecSD, Standard deviation of Specificity.