Table 7.

Summary of statistical and machine learning methods and data sources for geographic identification using Twitter data.

Public Health Issue	Method	Complementary Data
Depression	Non-Negative Matrix Factorization (Nmf) [70]
Dengue	Time-Series Susceptible-Infected-Recovered Model [103], Dbscan (Clustering) [21]	Brazilian Health Ministry
Obesity	Dbscan (Clustering) [54]
Miscellaneous	Latent Dirichlet Allocation [105], Support Vector Machine [105,106], Bayesian Inference [105], Random Forest [105], Multilayer Perceptron [105], Gaussian Mixture Regression (GMR) [102], HDBSCAN (Clustering) [106]	Map data