Additional File 1.

An Appendix is provided as an additional file in Microsoft® Office Word 2003 format. It contains operational definitions established a priori for adverse occurrence surveillance in this study. Definitions for occurrences related to escalation of care and airway management (ec00 to mazz) are adapted from Posner et al (Posner KL, Freund PR. Trends in quality of anesthesia care associated with changing staffing patterns, productivity, and concurrency of case supervision in a teaching hospital. Anesthesiology 1999;91(3):839-47). Medical occurrences (mc00 to muzz) are adapted from Reilly et al (Reilly DF, McNeely MJ, Doerner D, et al. Self-reported exercise tolerance and the risk of serious perioperative complications. Arch Intern Med 1999;159(18):2185-92) with additional details obtained from Harrison's textbook of Medicine (Fauci AS, Braunwald E, Isselbacher KJ, et al., eds. Harrison's Principles of Internal Medicine 14th Edition. Philadelphia: McGraw-Hill; 1998). Remaining definitions were developed by the study team with reference to the published literature when available. Additional information, such as itemized criteria for ascertainment and related published references, are available from our study team.

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Mirza et al. BMC Musculoskeletal Disorders 2006 7:53   doi:10.1186/1471-2474-7-53