TY - JOUR AU - Al Mamun, Mohammad AU - Ibrahim, Hamza M. AU - Turin, Tanvir Chowdhury PY - 2015 TI - Social Media in Communicating Health Information: An Analysis of Facebook Groups Related to Hypertension T2 - Preventing Chronic Disease JO - Prev Chronic Dis SP - E11 VL - 12 CY - Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. N2 - INTRODUCTION We studied Facebook groups related to hypertension to characterize their objectives, subject matter, member sizes, geographical boundaries, level of activity, and user-generated content. METHODS We performed a systematic search among open Facebook groups using the keywords "hypertension," "high blood pressure," "raised blood pressure," and "blood pressure." We extracted relevant data from each group's content and developed a coding and categorizing scheme for the whole data set. Stepwise logistic regression was used to explore factors independently associated with each group's level of activity. RESULTS We found 187 hypertension-related Facebook groups containing 8,966 members. The main objective of most (59.9%) Facebook groups was to create hypertension awareness, and 11.2% were created primarily to support patients and caregivers. Among the top-displayed, most recent posts (n = 164), 21.3% were focused on product or service promotion, whereas one-fifth of posts were related to hypertension-awareness information. Each Facebook group's level of activity was independently associated with group size (adjusted odds ratio [AOR], 1.02; 95% confidence interval [CI], 1.01-1.03), presence of "likes" on the most recent wall post (AOR, 3.55, 95% CI, 1.41-8.92), and presence of attached files on the group wall (AOR, 5.01, 95% CI, 1.25-20.1). CONCLUSION The primary objective of most of the hypertension-related Facebook groups observed in this study was awareness creation. Compared with the whole Facebook community, the total number of hypertension-related Facebook groups and their users was small and the groups were less active. SN - 1545-1151 UR - http://dx.doi.org/10.5888/pcd12.140265 DO - 10.5888/pcd12.140265 ER -