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The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
Published on: August 4, 2022
Predictive value of Medicare claims data for identifying revision of index hip replacement was modest
Jeffrey N Katz1, Elizabeth A Wright, John A Baron
1Orthopedic and Arthritis Center for Outcomes Research, Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston 02115, MA, USA. jnkatz@partners.org
Insights
Medicare claims can identify revision total hip replacement (THR) with 71% accuracy. However, claims data lacking side information may misclassify revisions, requiring adjustments in analyses.
Area of Science:
- Orthopedic Surgery
- Health Services Research
- Biostatistics
Background:
- Revision total hip replacement (THR) is a key indicator of THR quality and patient outcomes.
- Accurate identification of revision THR is crucial for quality assessment and research.
- Medicare claims data are widely used for health outcomes research but require validation.
Purpose of the Study:
- To evaluate the positive predictive value of Medicare claims in identifying revision THR.
- To assess the accuracy of claims data in distinguishing revisions of the index hip from contralateral procedures.
Main Methods:
- Utilized Medicare Part A claims from seven states for patients undergoing primary THR between July 1995 and June 1996.
- Tracked subsequent revision THR procedures through December 2006.
- Reviewed medical records for a sample of revision cases to confirm the operated side relative to the index THR.
Main Results:
- Of 374 subjects with codes for primary THR and subsequent revision, 71% (95% CI: 66-76%) had revisions on the index hip.
- Medicare claims data correctly identified revisions of the index THR in 71% of cases.
Conclusions:
- Medicare claims data alone can be ambiguous in identifying revision THR, particularly when the operated side is not specified.
- Claims-based studies on revision THR necessitate adjustments for potential misclassification due to unspecified operative side.
Objective:
To determine the positive predictive value of Medicare claims for identifying revision of total hip replacement (THR), a frequent marker of THR quality and outcome.
Study Design And Setting:
We obtained Medicare Part A (Hospital) claims from seven states on patients that had primary THR from July 1995 through June 1996. We searched claims to determine whether these THR recipients had a subsequent revision THR through December 2006. We selected a sample of subjects with codes indicating both index primary and subsequent revision THR. We obtained medical records for both procedures to establish whether the revision occurred on the same side as index primary THR.
Results:
Three hundred seventy-four subjects had codes indicating primary THR in 1995-96 and subsequent revision. Seventy-one percent (95% confidence interval: 66, 76) of the revisions were performed on the index joint and would be correctly attributed as revisions of the index THR, using Medicare claims data.
Conclusion:
Claims data on revision THR that do not contain information on the side that was operated on are ambiguous with respect to whether the revision was performed on the index or contralateral side. Claims-based analyses of revisions after an index THR should acknowledge and adjust for this source of potential misclassification.
