Table 2.

Characteristics of the Studies Included in the Review (n = 13).

Study	Study Design	Study Location	Target Population	Health Issue	Social Media Platforms	Role of Social Media	Analytic Tools	Metrics
Andrade (2018)	Observational	USA (Washington, DC)	Latino Immigrant Youth	Sexual health; Substance use; Interpersonal violence	Facebook pages	Disseminate information; Engage participants; Build community	Facebook Insights	•Page Reach •Post-level Engagement
Bull (2012)	RCT	USA (multiple settings)	Young adults	STI prevention	Facebook pages	Disseminate information; Engage participants	Google Analytics	•Page Reach (e.g., unique visitors) •Aggregate activity (e.g., average time spent on page) •Page-level engagement (e.g., most engaged with topic)
Dehlin (2019)	Observational	USA (Chicago, IL)	Gender and sexually marginalized communities	Pre-exposure Prophylaxis (PrEP) for HIV prevention	Facebook AdsInstagram Ads Campaign website	Disseminate information	Google Analytics	•Ad Reach •Audience Analysis •Aggregate Activity (e.g., time spent on the site)
Dowshen et al. (2015)	Observational	USA (Philadelphia, PA)	Youth	HIV and STI testing	Facebook page; Instagram page, Twitter page	Disseminate information	Facebook Insights	•Page Reach (e.g., number of followers)
Dulli (2018)	Pre-post Study	Nigeria	Youth and Young Adults	HIV care	Facebook groups	Disseminate information; Engage participants; Build community	Grytics	•Aggregate activity •Page-level engagement •Post-level engagement •User engagement
Jones et al. (2015))	Observational	USA (multiple settings)	Black women	HIV prevention	Facebook pages	Recruit participants	Google Analytics	•Ad Reach (e.g., daily reach, impressions, click-through rate, and cost per click) •Aggregate Activity (e.g., number of new posts, clicks) •Page-level Engagement (e.g., number of likes and shared posts)
Lambert (2014)	Observational	USA (Atlanta, GA)	Youth and Young Adults	Dating abuse/partner violence	Facebook pages; Twitter, YouTube, Flickr, Tumblr, and Pinterest	Disseminate information	Facebook Insights	•Page Reach (e.g., frequency of visits and unique users, •Audience Analysis •Page Engagement (e.g., page reactions and likes)
Patel (2018)	RCT	USA (New York City, NY)	Young Black and Latino Gay and Bisexual Men (YBLGBM)	Pre-exposure Prophylaxis (PrEP) for HIV prevention	Facebook groups	Disseminate information; Engage participants	Grytics	•Page-level Engagement •Post-level Engagement
Pedrana (2013)	Observational	Australia	Gay men	Sexual health-general	Facebook pages	Disseminate information; Engage participants	Facebook Insights	•Page Reach (e.g., unique page views, active users, photo views) •Audience Analysis •Aggregate Activity (e.g., number of posts) •Page-level Engagement (e.g. number of comments, and likes)
Ragsdale (2015)	Observational	USA (Mississippi))	Youth	Sexual health-general	Facebook pages	Disseminate information	Facebook Insights	•Page Reach •Audience Analysis •Page-level Engagement •Post-level Engagement
Solorio (2016)	Observational	USA (Seattle, WA)	Young Latino Immigrant Men who have sex with men (MSM)	HIV testing	Facebook pages	Disseminate information	Sprout Social	•Page Reach •Page-level Engagement
Syred (2014)	Observational	USA (nation-wide)	Youth and Young Adults	STI prevention	Facebook pages	Engage participants	Google Analytics	•Page Reach (e.g., total number of fans) •Audience Analysis •Aggregate Activity (e.g., number of posts) •Page engagement (e.g., number of comments)
Wang et al. (2019)	Observational	USA (nation-wide)	Young Latinos	Sexual health-general	Facebook pages	Disseminate information; Engage participants	Facebook Insights	•Post-level Reach (e.g., unique users who saw the post) •Post-level Engagement (e.g., number of comments, likes)