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Measuring postoperative recovery: what are clinically meaningful differences?

Ioana Antonescu1, Susan Scott2, Tung T Tran1

  • 1Steinberg-Bernstein Centre for Minimally Invasive Surgery and Innovation, McGill University Health Centre, Montreal, QC, Canada.

Surgery
|June 21, 2014
PubMed
Summary

This study provides minimal clinically important difference (MCID) estimates for patient-reported recovery metrics after abdominal surgery. These values aid in interpreting trial results and guiding surgical innovation.

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Area of Science:

  • Surgical outcomes research
  • Patient-reported outcome measures
  • Clinical trial design

Background:

  • Patient-reported outcomes (PROs) are key to assessing surgical recovery.
  • Minimal Clinically Important Difference (MCID) is vital for interpreting PRO changes in trials.
  • Estimating MCIDs for recovery metrics is essential for surgical innovation.

Purpose of the Study:

  • To generate MCID estimates for three key postoperative recovery metrics.
  • To inform the design and interpretation of abdominal surgery clinical trials.
  • To establish benchmarks for meaningful recovery after surgery.

Main Methods:

  • Analysis of prospectively collected data from two adult patient cohorts (n=281, n=130) undergoing abdominal surgery.
  • Utilized the SF-36, CHAMPS, and 6-minute walk test (6MWT) for recovery assessment.

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  • Employed an anchor-based approach with regression models, using patient self-rated health to predict outcome scores.

    • Main Results:

    • MCID estimates for SF-36 domains varied based on self-rated health, ranging from 8-15 for 'excellent/very good' to 15-32 for 'fair/poor'.
    • MCID for the Community Healthy Activities Model Program for Seniors (CHAMPS) was 8 kcal/kg/week.
    • MCID for the 6-minute walk test (6MWT) was 14 meters.

    Conclusions:

    • Plausible MCID values and confidence intervals were established for selected postoperative recovery metrics.
    • These MCID estimates are crucial for planning and interpreting future abdominal surgery clinical trials.
    • The findings support the use of PROs in evaluating surgical recovery and guiding clinical decision-making.