alexa Determination of the anaerobic threshold in the pre-operative assessment clinic: inter-observer measurement error.


Journal of Anesthesia & Clinical Research

Author(s): Sinclair RC, Danjoux GR, Goodridge V, Batterham AM

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Abstract The variability between observers in the interpretation of cardiopulmonary exercise tests may impact upon clinical decision making and affect the risk stratification and peri-operative management of a patient. The purpose of this study was to quantify the inter-reader variability in the determination of the anaerobic threshold (V-slope method). A series of 21 cardiopulmonary exercise tests from patients attending a surgical pre-operative assessment clinic were read independently by nine experienced clinicians regularly involved in clinical decision making. The grand mean for the anaerobic threshold was 10.5 ml O(2).kg body mass(-1).min(-1). The technical error of measurement was 8.1\% (circa 0.9; 90\% confidence interval, 7.4-8.9\%). The mean absolute difference between readers was 4.5\% with a typical random error of 6.5\% (6.0-7.2\%). We conclude that the inter-observer variability for experienced clinicians determining the anaerobic threshold from cardiopulmonary exercise tests is acceptable. This article was published in Anaesthesia and referenced in Journal of Anesthesia & Clinical Research

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