Table 4.

Model performance on the test set for predicting age group of Reddit users using gradient boosted trees classifier with all features vs select features.

Age group		Precision	Recall	F1 score	AUROCa	Support, n
Model with all features (1523 features)
	13-20 years	0.81	0.87	0.84	—b	254
	21-54 years	0.77	0.67	0.72	—	161
	Overall	—	—	0.79	0.87	415
Reduced model with selected features (15 features)
	13-20 years	0.79	0.89	0.84	—	254
	21-54 years	0.78	0.63	0.70	—	161
	Overall	—	—	0.78	0.86	415

^aAUROC: area under the receiver operating characteristics curve.

^bNot available or not applicable.