Detecting Hypoglycemia Incidents Reported in Patients’ Secure Messages: Using Cost-Sensitive Learning and Oversampling to Reduce Data Imbalance

Jinying Chen   ^{1, 2} , PhD ;   John Lalor   ^{2, 3} , MS ;   Weisong Liu   ^{2, 4} , PhD ;   Emily Druhl   ² , MPH ;   Edgard Granillo   ^{1, 2} , MD ;   Varsha G Vimalananda   ^{2, 5} , MPH, MD ;   Hong Yu   ^{2, 3, 4, 6} , PhD, FACMI

¹ Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, United States

² Bedford Veterans Affairs Medical Center, Center for Healthcare Organization and Implementation Research, Bedford, MA, United States

³ College of Information and Computer Sciences, University of Massachusetts Amherst, Amherst, MA, United States

⁴ Department of Computer Science, University of Massachusetts Lowell, Lowell, MA, United States

⁵ School of Medicine, Boston University, Boston, MA, United States

⁶ Department of Medicine, University of Massachusetts Medical School, Worcester, MA, United States