The Ontario Prehospital Advanced Life Support (OPALS) Study part II: Rationale and methodology for trauma and respiratory distress patients

I. G. Stiell, G. A. Wells, Daniel W Spaite, G. Nichol, B. O'Brien, D. P. Munkley, B. J. Field, M. B. Lyver, L. G. Luinstra, E. Dagnone, T. Campeau, R. Ward, S. Anderson

Research output: Contribution to journalArticle

42 Scopus citations


The Ontario Prehospital Advanced Life Support (OPALS) Study represents the largest prehospital study yet conducted, worldwide. This study will involve more than 25,000 cardiac arrest, trauma, and critically ill patients over an 8-year period (1994-2002). The current article, Part II, describes in detail the rationale and methodology for major trauma and respiratory distress patients and for an economic evaluation of Advanced Life Support (ALS) programs in the OPALS Study. The OPALS Study, using a rigorous controlled methodology and a large sample size, should clearly indicate the benefit in trauma and respiratory distress patient survival and morbidity that results from the widespread introduction of prehospital ALS programs to cummunities of many different sizes.

Original languageEnglish (US)
Pages (from-to)256-262
Number of pages7
JournalAnnals of Emergency Medicine
Issue number2
Publication statusPublished - 1999
Externally publishedYes


ASJC Scopus subject areas

  • Emergency Medicine

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