| Study Design | Any quantitative study design | Qualitative studies unless they reported a quantification of mental health care utilization |
| Language | Available in the English Language | Unavailable in the English Language |
| Setting | Low- and Middle-Income counties either in 1987 or in 2017 to allow for income changes over time | High Income countries in 1987, that remained high income in 2017. |
| Publication | Peer-reviewed academic articles | Policy reviews, systematic reviews, opinion pieces, editorials, letters to the editor, book chapters, commentaries or conference abstracts |
| Topic | Studies the impact of community-based, national or social health insurance on mental healthcare utilization | Does not study the impact of community-based, national or social health insurance on mental healthcare utilization or, examines the impact of private health insurance on mental healthcare utilization. |
