Karlon H. Johnson Jr. PhD

Evelyn F. McKnight CrossROADS Scholar
Email: khj12@miami.edu  

 

Department of Neurology
Miller School of Medicine, University of Miami
1120 NW 12th Street, Miami, FL 33136

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Karlon Howard Johnson Jr., PhD, is a CrossROADS Postdoctoral Scholar at the University of Miami Miller School of Medicine, where he studies the connection between vascular health, multimorbidity, and Alzheimer’s disease. He earned his PhD in Epidemiology at the University of Miami, where his research on discharge communication and post-stroke outcomes was supported by the PhRMA Foundation Value Assessment and Health Outcomes Research Fellowship. As a CrossROADS scholar, Dr. Johnson is mentored by Dr. Tatjana Rundek, whose leadership in stroke and neurovascular research guides his transition into Alzheimer’s disease research. His project aims to develop a more accurate operational definition of Alzheimer’s disease using structured and unstructured EHR data from the UM Epic system, utilizing LLMs and natural language processing. He also investigates the temporal trajectories of both traditional and non-traditional multimorbidities, along with individual risk and protective factors that influence Alzheimer’s disease development. A key part of his work is understanding how these multimorbidity and risk trajectories vary across demographic groups and contribute to disparities in AD detection and prediction. Dr. Johnson plans to create an interdisciplinary research program that promotes equitable, data-driven approaches to dementia prevention and early diagnosis.”