Table 1.

Performance comparison of feature selection strategies under 10-time 10-fold cross-validation. The number of features for each set is given in parentheses. The best performance across each 10-fold CV is highlighted in bold.

	Initial (1446)	Variance (1074)	Correlation (439)	RF Importance (64)	RFECV (57)	Final (8)
1st 10-Fold	80.06 ± 1.49	80.25 ± 2.17	80.18 ± 1.67	80.34 ± 1.05	80.2 ± 0.89	80.94 ± 1.07
2nd 10-Fold	80.67 ± 2.08	80.26 ± 1.87	80.56 ± 2.08	80.2 ± 3.01	80.58 ± 2.7	81.23 ± 2.04
3rd 10-Fold	80.81 ± 1.17	80.64 ± 1.83	79.48 ± 0.96	80.54 ± 2.04	80.33 ± 2.34	81.02 ± 1.86
4th 10-Fold	81.19 ± 1.81	80.14 ± 1.67	79.64 ± 1.51	80.35 ± 1.22	80.12 ± 1.52	80.52 ± 1.7
5th 10-Fold	80.66 ± 1.18	81.17 ± 1.23	79.55 ± 1.33	81.29 ± 1.2	81.13 ± 1.28	80.98 ± 1.59
6th 10-Fold	80.41 ± 1.12	80.13 ± 1.22	80.82 ± 1.59	81.15 ± 1.3	80.64 ± 1.05	81.36 ± 1.46
7th 10-Fold	81.42 ± 0.58	80.92 ± 1.61	80.67 ± 1.73	80.12 ± 1.55	80.85 ± 1.59	81.18 ± 1.19
8th 10-Fold	80.63 ± 1.53	81.02 ± 1.15	80.95 ± 0.87	80.58 ± 1.61	80.61 ± 2.34	81.01 ± 1.6
9th 10-Fold	81.13 ± 1.28	80.25 ± 1.43	80.43 ± 1.44	79.86 ± 1.11	79.76 ± 1.1	81.04 ± 0.96
10th 10-Fold	80.54 ± 1.08	80.24 ± 1.74	80.52 ± 0.92	80.68 ± 1.29	80.68 ± 1.32	81.03 ± 1.12