Fig. 4From: Single nucleotide polymorphism genes and mitochondrial DNA haplogroups as biomarkers for early prediction of knee osteoarthritis structural progressors: use of supervised machine learning classifiersFinding the best input variable combinations. The combinations with the most important variables from sensitivity analysis for the progressor population used models built with a one variable, b two variables, c three variables, and d four and five variables. BMI, body mass index; M1–M31 number of models; train, training stage; test, testing stageBack to article page