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Reliability of the Modified Radiographic Union Score for Tibia Fractures (mRUST) for Femoral Shaft Fractures.

Gregory Schmidt1, David Foley, Austin Simpson

  • 1Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN.

Journal of Orthopaedic Trauma
|February 2, 2023
PubMed
Summary

The modified Radiographic Union Score for Tibia Fractures (mRUST) demonstrates high reliability for assessing femur fracture healing, regardless of surgeon experience. This scoring system is effective for both trainees and experienced surgeons.

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Trauma Care

Background:

  • Assessing radiographic bone healing is crucial for fracture management.
  • The modified Radiographic Union Score for Tibia Fractures (mRUST) is a tool used for this purpose.
  • Evaluating the reliability of mRUST for femur fractures is important for clinical application.

Purpose of the Study:

  • To assess the interobserver and intraobserver reliability of mRUST for evaluating femur shaft fractures.
  • To determine the influence of rater experience on mRUST reliability.

Main Methods:

  • Retrospective cohort study at a Level 1 trauma center.
  • Included patients aged 18-55 with femur shaft fractures treated with intramedullary nailing.
  • Interobserver and intraobserver reliability were calculated using the intraclass correlation coefficient.

Main Results:

  • Overall interobserver reliability for mRUST was 0.96.
  • Overall intraobserver reliability for mRUST was 0.98.
  • Reliability remained high for both fellowship-trained evaluators and trainees.

Conclusions:

  • mRUST shows high interobserver and intraobserver reliability in assessing radiographic healing of femur shaft fractures.
  • The tool's reliability is consistent across different postoperative time frames.
  • mRUST is a reliable method for evaluating femur fractures, suitable for surgeons of all experience levels.