Table 7. E-cigarette Use for Smoking Cessation - 10 Fold Cross Validation Area Under the Receiver Operating Curve (AUC) Performance (Range of Performances Across 10 folds).

Encoding Name	Naïve Bayes	Liblinear	Bayesian Logistic Regression	Random Forests
unigram	0.57 (0.45-0.71)	0.78 (0.68-0.92)	0.88 (0.74-1.0)	0.94 (0.81-0.97)
bigram	0.53 (0.38-0.68)	0.75 (0.65-0.87)	0.87 (0.73-0.95)	0.93 (0.86-0.98)
stem_unigram	0.59 (0.51-0.78)	0.80 (0.55-0.90)	0.89 (0.67-0.98)	0.93 (0.82-0.99)
stem_bigram	0.50 (0.38-0.71)	0.76 (0.65-0.88)	0.89 (0.83-0.95)	0.94 (0.86-0.97)
stop_unigram	0.59 (0.49-0.74)	0.71 (0.40-0.91)	0.87 (0.76-0.97)	0.90 (0.81-0.96)
stop_bigram	0.59 (0.42-0.70)	0.69 (0.44-0.82)	0.86 (0.71-0.98)	0.88 (0.81-0.98)
stop_stem_unigram	0.60 (0.51-0.72)	0.70 (0.41-0.86)	0.85 (0.72-0.95)	0.86 (0.79-0.96)
stop_stem_bigram	0.57 (0.46-0.66)	0.69 (0.41-0.90)	0.83 (0.37-0.94)	0.87 (0.80-0.97)