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. 2017 Sep 26;3(3):e63. doi: 10.2196/publichealth.8060

Table 2.

Classification of Twitter users who tweet about e-cigarettes: Gradient Boosting Regression Trees (GBRT) results comparing full model and metadata-only model.

User type Full model (metadata + derived data) Metadata-only model
F1 score, % Recall, % Precision, % F1 score, % Recall, % Precision, %
Individual 91.1 92.3 89.8 83.6 86.2 81.2
Vaper enthusiast 47.1 40.0 57.1 16.2 12.0 25.0
Informed agency 84.4 78.5 91.3 70.0 67.7 72.4
Marketer 81.2 85.9 77.0 65.6 72.6 59.9
Spammer 79.5 81.1 78.0 74.8 71.9 78.0
Average 83.3 83.7 83.3 72.7 73.7 72.3