Machine Learning–Based Suicide Risk Prediction Model for Suicidal Trajectory on Social Media Following Suicidal Mentions: Independent Algorithm Validation

Zachary Kaminsky   ^{1, 2, 3, 4} , PhD ;   Robyn J McQuaid   ^{1, 5} , PhD ;   Kim GC Hellemans   ⁵ , PhD ;   Zachary R Patterson   ⁵ , PhD ;   Mysa Saad   ^{1, 6} , MSc, MD ;   Robert L Gabrys   ⁵ , PhD ;   Tetyana Kendzerska   ^{6, 7} , MD, PhD ;   Alfonso Abizaid   ⁵ , PhD ;   Rebecca Robillard   ^{1, 8} , PhD

¹ University of Ottawa Institute of Mental Health Research at The Royal, Ottawa, ON, Canada

² Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada

³ Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁴ Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States

⁵ Department of Neuroscience, Carleton University, Ottawa, ON, Canada

⁶ Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada

⁷ The Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON, Canada

⁸ Department of Psychology, University of Ottawa, Ottawa, ON, Canada