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A Crosswalk Between UCLA and Lower Extremity Activity Scales
Hassan M K Ghomrawi1, Yuo-Yu Lee2, Christina Herrero3
1Departments of Surgery and Pediatrics, Feinberg School of Medicine, Northwestern University, 633 N Saint Clair, 20th floor, Chicago, IL, 60611, USA. hassan.ghomrawi1@northwestern.edu.
Clinical Orthopaedics and Related Research
|October 28, 2016
Summary
A new crosswalk allows conversion between the UCLA and LEAS activity scales for total hip (THA) and knee (TKA) replacements. This tool aids in comparing and pooling data from studies using either scale.
Area of Science:
- Orthopedic Surgery
- Rehabilitation Medicine
- Biostatistics
Background:
- The UCLA and LEAS are leading scales for assessing patient activity after joint replacement.
- Current scales lack convertibility, hindering data comparison and meta-analyses.
- A validated crosswalk is needed to standardize activity level assessments.
Purpose of the Study:
- To develop and validate a crosswalk between the UCLA and LEAS activity scales.
- Facilitate score conversion for patients undergoing total hip arthroplasty (THA) or total knee arthroplasty (TKA).
Main Methods:
- Equipercentile equating method used to create the crosswalk.
- Matched preoperative and 2-year postoperative UCLA and LEAS scores from TKA and THA cohorts.
- Responsiveness and discriminative ability assessed using standard response means and ROC curves.
Main Results:
- Converted scores showed no significant difference compared to actual UCLA and LEAS scores for TKA and THA.
- Responsiveness of converted scores was comparable to actual scores.
- No significant difference in the area under the ROC curve for actual versus converted scores.
Conclusions:
- A validated crosswalk for converting UCLA and LEAS scores in THA and TKA patients has been developed.
- This tool enables easier comparison and pooling of data across studies.
- Potential for extending the crosswalk to other lower extremity conditions and procedures.
