Table 1 Inclusion and exclusion criteria

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.