Attracting Users to Online Health Communities: Analysis of LungCancer.net’s Facebook Advertisement Campaign Data

Lindsey N Horrell   ^{1 *} , BSN, MPH, PhD ;   Allison J Lazard   ^{2, 3 *} , PhD ;   Amrita Bhowmick   ^{1, 4 *} , MPH, MBA ;   Sara Hayes   ^{4 *} , MPH ;   Susan Mees   ^{4 *} , BA ;   Carmina G Valle   ^{3, 5 *} , MPH, PhD

¹ Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States

² School of Media and Journalism, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States

³ Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States

⁴ Health Union, LLC, Philadelphia, PA, United States

⁵ Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States

*all authors contributed equally