• Hannah Wunsch, Kathryn M Rowan, and Derek C Angus.
• Department of Anesthesiology, Columbia University, New York, New York 10032, USA. hw2125@columbia.edu
• Curr Opin Crit Care. 2007 Dec 1;13(6):725-31.

Purpose Of ReviewUnderstanding variation in critical care resources, and delivery of care between countries will allow for improved disaster planning, evaluation of research findings, and assessment of the utility of critical care itself. This review describes the available data for international comparisons and the many factors that need to be addressed for an appropriate interpretation of results.Recent FindingsRecent studies on subgroups of critical care patients include data from many different countries. These new studies provide important information on the overall incidence of these disease states, but most of these international studies do not take into account the critical care resources of the countries being discussed. For an appropriate interpretation of findings the relevant baseline critical care resources, prevalence of diseases, and cultural practices, need to be quantified. The existence of these other factors prevents the use of a severity of illness scoring system alone to account for differences between countries.SummaryMany recent critical care studies include data from multiple countries. With continued movement towards international studies, and improvements in data collection systems, comparisons between countries are becoming easier. These findings need to be interpreted in the context of all the relevant country information.

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