Table 1.

Parameters of the random forest model.

Model	N a	MSE d	VE (%) e
Random forest model b	500	0.86	81.98
Parsimonious model c	500	0.49	89.86

^a number of trees; ^b random forest model fitted based on all the differential metabolites; ^c random forest model fitted based on the top 37 metabolites ranked by the percentage increase in mean square error (%IncMSE) value; ^d mean of squared residuals; ^e percentage of variance explained by the random forest model.