Journal article
Total Knee Arthroplasty Volume, Utilization, and Outcomes Among Medicare Beneficiaries, 1991-2010
JAMA : the journal of the American Medical Association, Vol.308(12), pp.1227-1236
2012
DOI: 10.1001/2012.jama.11153
PMCID: PMC4169369
PMID: 23011713
Abstract
Context Total knee arthroplasty (TKA) is one of the most common and costly surgical procedures performed in the United States.
Objective To examine longitudinal trends in volume, utilization, and outcomes for primary and revision TKA between 1991 and 2010 in the US Medicare population.
Design, Setting, and Participants Observational cohort of 3 271 851 patients (aged ≥65 years) who underwent primary TKA and 318 563 who underwent revision TKA identified in Medicare Part A data files.
Main Outcome Measures We examined changes in primary and revision TKA volume, per capita utilization, hospital length of stay (LOS), readmission rates, and adverse outcomes.
Results Between 1991 and 2010 annual primary TKA volume increased 161.5% from 93 230 to 243 802 while per capita utilization increased 99.2% (from 31.2 procedures per 10 000 Medicare enrollees in 1991 to 62.1 procedures per 10 000 in 2010). Revision TKA volume increased 105.9% from 9650 to 19 871 while per capita utilization increased 59.4% (from 3.2 procedures per 10 000 Medicare enrollees in 1991 to 5.1 procedures per 10 000 in 2010). For primary TKA, LOS decreased from 7.9 days (95% CI, 7.8-7.9) in 1991-1994 to 3.5 days (95% CI, 3.5-3.5) in 2007-2010 (P < .001). For primary TKA, rates of adverse outcomes resulting in readmission remained stable between 1991-2010, but rates of all-cause 30-day readmission increased from 4.2% (95% CI, 4.1%-4.2%) to 5.0% (95% CI, 4.9%-5.0%) (P < .001). For revision TKA, the decrease in hospital LOS was accompanied by an increase in all-cause 30-day readmission from 6.1% (95% CI, 5.9%-6.4%) to 8.9% (95% CI, 8.7%-9.2%) (P < .001) and an increase in readmission for wound infection from 1.4% (95% CI, 1.3%-1.5%) to 3.0% (95% CI, 2.9%-3.1%) (P < .001).
Conclusions Increases in TKA volume have been driven by both increases in the number of Medicare enrollees and in per capita utilization. We also observed decreases in hospital LOS that were accompanied by increases in hospital readmission rates.
Details
- Title: Subtitle
- Total Knee Arthroplasty Volume, Utilization, and Outcomes Among Medicare Beneficiaries, 1991-2010
- Creators
- Peter CRAM - Division of General Internal Medicine, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, United StatesXin Lu - Division of General Internal Medicine, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, United StatesStephen L KATES - Departments of Orthopaedic Surgery, University of Rochester, Rochester, New York, United StatesJasvinder A SINGH - Department of Medicine, University of Alabama at Birmingham and Birmingham Veterans Affairs Medical Center, United StatesYue Li - Department of Community and Preventive Medicine, University of Rochester, Rochester, New York, United StatesBrian R WOLF - Department of Orthopaedic Surgery, University of Iowa Carver College of Medicine, Iowa City, United States
- Resource Type
- Journal article
- Publication Details
- JAMA : the journal of the American Medical Association, Vol.308(12), pp.1227-1236
- DOI
- 10.1001/2012.jama.11153
- PMID
- 23011713
- PMCID
- PMC4169369
- NLM abbreviation
- JAMA
- ISSN
- 0098-7484
- eISSN
- 1538-3598
- Publisher
- American Medical Association; Chicago, IL
- Language
- English
- Date published
- 2012
- Academic Unit
- Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science; Internal Medicine
- Record Identifier
- 9984040218202771
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