“…Extraction forms included six categories of information: (1) study logistics (setting, country, publication year, study design, funding source), (2) study population characteristics (number of subjects, age, gender, race/ethnicity, sexual minorities included, education level, and income), (3) SMU (number of social networking sites, time of usage and frequency, scales, contextual measures), (4) health outcomes measured (primary and secondary outcomes measured and scales), (5) main results and limitations, and (6) appropriateness of reporting. To ensure accuracy, we implemented a quality control mechanism in which one reviewer completed a first data extraction and the second reviewer validated or disagreed with it.…”