Table 1.

Approaches for classifying depression using social media.

Ref	Media	Cohort Acquisition	Features	Approach	Results
18,19	Twitter	Clinical depression surveys	Interactions, emoticons, vocabulary, drugs, linguistic style, behaviors	Support vector machine	0.74 precision 0.63 recall
20	Bulletin boards	Prozac post, doctor curation	Vocabulary	2-step support vector machine	0.82 accuracy AUC 0.88
21	Sina	Psychologist curation	Pronoun use, emoticons. interactions, behaviors	Weka, BayesNet	0.91 accuracy AUC 0.90