Inclusion and exclusion criteria
| Criterion | Definition |
| Population | Population of young adults (>18 and ≤30), or explicit address this part of the population. Surveys that also screen children or adults will be included if the procedure for young adults is described. |
| Screening procedure | Peer-reviewed publications on a health-related topic with the aim of describing, elaborate, systematise and/or quantifying OHISB, use of the internet, search engines, browsers, web 2.0 or 3.0, social media or other online platforms retrieving information. |
| OHISB definitions | A qualitative or quantitative description of an active effort to obtain health-related information about a specific topic, using any digital sources to obtain the desired information, that occurs outside of routine patterns of interpersonal communication or media use.6 18 36 |
| Platform | Interested in determining what digital platforms young adults tend to use when searching for health information. |
| Characteristics | Interested in identifying traits, characteristics or interfaces on these digital platforms that young adults prefer, enjoy or have a significant meaning for those using the exact platform. |
| Setting | Primarily observational studies or self-reported studies from the global north. However, it may include studies developed in other parts of the world if the methodology employed is subsequently. |
OHIS, online health information seeking; OHISB, online health information seeking behaviour.