Sharing Health Information on Facebook: Practices, Preferences, and Risk Perceptions of North American Users

Motivated by the benefits, people have used a variety of webbased services to share health information (HI) online. Among these services, Facebook, which enjoys the largest population of active subscribers, has become a common place for sharing various types of HI. At the same time, Facebook was shown to be vulnerable to various attacks, resulting in unintended information disclosure, privacy invasion, and information misuse. As such, Facebook users face the dilemma of benefiting from HI sharing and risking their privacy. In this work, we investigate HI sharing practices, preferences, and risk perceptions among Facebook users. We interviewed 21 participants with chronic health conditions to identify the key factors that influence users' motivation to share HI on Facebook. We then conducted an online survey with 492 Facebook users in order to validate, refine, and extend our findings. While some factors related to sharing HI were found in literature, we provide a deeper understanding of the main factors that influenced users' motivation to share HI on Facebook. The results suggest that the gained benefits from prior HI sharing experiences, and users' overall attitudes toward privacy, correlate with their motivation to disclose HI. Furthermore, we identify other factors, specifically users' perceived health and the audience of the shared HI, that appear to be linked with users' motivation to share HI. Finally, we suggest design improvements— such as anonymous identity as well as search and recommendation features—for facilitating HI sharing on Facebook and similar sites