B C Reid1, A J Alberg, A C Klassen, W M Koch, J M Samet. 1. Department of Oral Health Care Delivery, School of Dentistry, Room 3E-04, University of Maryland, 666 West Baltimore Street, Baltimore, Maryland 21203, USA. bcr001@dental.umaryland.edu
Abstract
BACKGROUND: We assessed the American Society of Anesthesiologists' (ASA) class, as a measure of comorbidity in comparison to the commonly used Charlson index for prognostic ability in a HNCA population. METHODS: Proportional hazards methods were applied to head and neck cancer patients whose treatment included surgery by the Johns Hopkins Otolaryngology service (n = 388). RESULTS: The Charlson index and ASA class were modestly correlated (Spearman 0.36, p <.001). Compared with patients with ASA class 1 or 2, those with ASA class 3 or 4 had a two-fold elevated mortality rate (Relative Hazard (RH) = 2.00, 95% CI, 1.38-2.89). This association was stronger than observed for a Charlson index score of 1 or more compared with 0 (RH = 1.59, 95% CI, 1.17-2.17). Both the Charlson index and ASA class adjusted RHs displayed dose-response patterns (p value for trend <.001). CONCLUSIONS: Compared with the Charlson index, the ASA class had comparable if not greater prognostic ability for mortality in this elderly HNCA population. Copyright 2001 John Wiley & Sons, Inc. Head Neck 23: 985-994, 2001.
BACKGROUND: We assessed the American Society of Anesthesiologists' (ASA) class, as a measure of comorbidity in comparison to the commonly used Charlson index for prognostic ability in a HNCA population. METHODS: Proportional hazards methods were applied to head and neck cancerpatients whose treatment included surgery by the Johns Hopkins Otolaryngology service (n = 388). RESULTS: The Charlson index and ASA class were modestly correlated (Spearman 0.36, p <.001). Compared with patients with ASA class 1 or 2, those with ASA class 3 or 4 had a two-fold elevated mortality rate (Relative Hazard (RH) = 2.00, 95% CI, 1.38-2.89). This association was stronger than observed for a Charlson index score of 1 or more compared with 0 (RH = 1.59, 95% CI, 1.17-2.17). Both the Charlson index and ASA class adjusted RHs displayed dose-response patterns (p value for trend <.001). CONCLUSIONS: Compared with the Charlson index, the ASA class had comparable if not greater prognostic ability for mortality in this elderly HNCA population. Copyright 2001 John Wiley & Sons, Inc. Head Neck 23: 985-994, 2001.
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