Table 4: Average standard deviation positive predictive value (PPV) [%] of SVM, MLP1, MLP2, and NB for decreasing number of folders in the RCV process. no SMOTE = no oversampling correction of class imbalance is done.

nfolds SMOTE
SVMMLP2MLP1NB

105.52 0.353.92 0.095.61 0.475.28 0.16
55.43 0.273.98 0.15.25 0.145.29 0.31
45.39 0.13.99 0.015.29 0.195.29 0.07
35.48 0.13.94 0.035.34 0.075.4 0.09

no SMOTE
SVMMLP2MLP1NB

1042.22 29.866.23 1.53NA9.05 1.11
532.47 16.635.40 0.590.009.02 0.95
445.24 5.356.60 1.960.009.09 1.13
345.24 12.146.22 0.82NA8.90 0.89