Performance of the classification tree models using only the first two splits

Performance of the classification treeOversampled training set
n = 4,506, including 2,253 current vapers and 2,253 former vapers
Validation set
n = 306, including 56 current vapers and 250 former vapers
Tree compositionAccuracySensitivitySpecificityAccuracySensitivitySpecificity
First split only0.640.600.680.670.560.70
First two splits0.660.740.600.630.670.62
Full tree0.710.700.710.720.650.73