Table 1 Inclusion and exclusion criteria

Time

January 1990 – July 2015

Studies before 1990 and after July 2015

Language

English, German

Any other language

Type of publication

Original papers published in peer-reviewed journals, or reports

Any non-original publication, any editorials, letters to editors, theses, books

Focus of study

Any study reporting on a generic health literacy instrument, its first-time use, development or validation process

Any study reporting on a domain-specific health literacy instrument (i.e. mental health literacy, media or eHealth literacy), and any non-health literacy instrument

Study population

Articles including children and adolescents ≤18 years

Any population older > 18 years

Setting

Any setting

Nil

Country

Any country

Nil