“How Did We Get Here?”: Topic Drift in Online Health Discussions

Albert Park   ¹ , PhD ;   Andrea L Hartzler   ² , PhD ;   Jina Huh   ³ , PhD ;   Gary Hsieh   ⁴ , PhD ;   David W McDonald   ⁴ , PhD ;   Wanda Pratt   ⁵ , PhD

¹ University of Utah, School of Medicine, Department of Biomedical Informatics, Salt Lake City, UT, United States

² Group Health Research Institute, Seattle, WA, United States

³ University of California San Diego, School of Medicine, Department of Biomedical Informatics, La Jolla, CA, United States

⁴ University of Washington, Department of Human Centered Design & Engineering, Seattle, WA, United States

⁵ University of Washington, Information School, Seattle, WA, United States