Table 5  Summary of model fit statistics across models for all subjects
Model  Random Forest R2: Analysis Data Set  MARS GCV R2: Analysis Data Set  Linear Regression R2: Analysis Data Set  Linear Regression R2: Validation Data Set (applied)  Linear Regression R2: Validation Data Set (Refit)
WBC  0.28  0.27  0.29  0.29  0.31
EPI8  0.40  0.42  0.41  0.35  0.38
DEH11  0.28  0.28  0.29  0.25  0.27
HDL  0.40  0.37  0.39  0.40  0.41