Table 1

Overview of inclusion and exclusion criteria

Study designsOriginal and peer-reviewed research:
  • Case studies

  • Quantitative studies

  • Comments, statements, replies, editorials

  • Qualitative studies

  • Animal studies

  • Cell studies

  • Reviews*

PopulationNo restriction
CountryHigh-income countries according to the United Nations classification:Studies conducted in middle-income or low-income countries
Australia, Austria, Belgium, Bulgaria, Canada, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Spain, Slovakia, Slovenia, Sweden, Switzerland, UK, USA
Determinants of interest1. Any measure used to indicate the socioeconomic position, such as
  • Educational status

  • Income

  • Deprivation

  • Occupational status

2. Determinants of access at the mesolevel, for example,Determinants of access at the macrolevel, for example,
  • Physician density at a regional level

  • Insurance status

  • Distance/travel time

  • Provider payment schemes

  • Consultation/office hours

OutcomesAny measure of individual healthcare use
  • Health status

  • Health-related behaviour (physical activity, smoking)

LanguagesGerman, EnglishOther languages
Publication datePublished since 1 January 2000Published after 31 March 2020
  • *Reviews are not included, but the references will be screened for studies of interest.