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Comparisons of health between countries are popular and useful, and often attract media attention. This guide highlights the types of questions to ask before comparing countries and when presenting health data in an international context.
We are often interested to see how our national experiences of health and health care compare on an international scale. These comparisons create a broader perspective for researchers, policy makers and the general public. Being aware of the successes and setbacks of other countries may inform how new policies, health interventions or preventative measures are developed and implemented in one’s own country.
International health comparisons can attract media attention, particularly if attempts are made to rank countries by performance.
However, making valid comparisons of health across different countries is not always easy.
Both the use and interpretation of international comparisons need to be considered carefully. If the data and methods that underlie these comparisons are not assessed, the results could be misinterpreted. There are methodological issues to consider in assessing data availability and quality, and in deciding which countries to compare. Decisions about the data used and the countries selected should be documented with adequate rationale to ensure the limitations and assumptions are clear and duly considered. These decisions can influence the differences observed between countries and the conclusions made.
The guide is intended to encourage users of international health-related data to consider the complexities before comparing countries, and to assist them in interpreting the results of these comparisons. It presents examples to highlight the types of questions to ask when using health data in an international context. The checklist presented in the Appendix and summarised below is not exhaustive; furthermore, considering these questions may not be possible in all cases.
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