Key result
The ASA physical status score predicted 6-month mortality and functional status, while ASA class 1 was associated with a higher rate of early revision after hip arthroplasty compared to ASA class 3 (HR 1.39; 95% CI 1.04-1.95; P=0.015).
Why the study?
Does a higher ASA physical status rating predict increased mortality, early revision, and poorer clinical outcomes in patients undergoing total hip or knee arthroplasty?
Population
41,034 patients recorded in the New Zealand Joint Registry from 2005 to 2008.
Comparison
Higher ASA physical status rating vs Lower ASA physical status rating
Design
Cohort
Follow-up
6 months to 2 years
Authors
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ASA class aids preoperative risk stratification for arthroplasty mortality and function; extends registry data but leaves open need for prospective validation.
Cohort (n=41,034)
Yes
Does a higher ASA physical status rating predict increased mortality, early revision, and poorer clinical outcomes in patients undergoing total hip or knee arthroplasty?
Hazard Ratio: 1.39 (95% CI 1.04–1.95)
p-value: p=0.015
The ASA physical status score is a significant predictor of postoperative mortality, functional status, and early revision following total hip and knee arthroplasty.
Hooper et al. (2012) conducted a cohort in Total hip or knee arthroplasty (n=41,034). American Society of Anesthesiologists (ASA) physical status rating vs. Different ASA classes (e.g., ASA class 3) was evaluated on Early revision (less than two years after the index procedure) following total hip arthroplasty (ASA class 1 vs ASA class 3) (HR 1.39, 95% CI 1.04-1.95, p=0.015). The ASA physical status score predicted 6-month mortality and functional status, while ASA class 1 was associated with a higher rate of early revision after hip arthroplasty compared to ASA class 3 (HR 1.39; 95% CI 1.04-1.95; P=0.015).
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