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Updated: May 16, 2026
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Clinical Application of Microscope-Assisted Minimally Invasive Anterior Lumbar Interbody Fusion
Published on: June 16, 2023
Differentiating minimum clinically important difference for primary and revision lumbar fusion surgeries.
Leah Y Carreon1, Kelly R Bratcher, Chelsea E Canan
1Norton Leatherman Spine Center, Louisville, KY 40202, USA. leah.carreon@nortonhealthcare.org
Journal of Neurosurgery. Spine
|November 20, 2012
Summary
Minimum clinically important difference (MCID) values for lumbar fusion are similar in primary and revision surgery patients. This finding simplifies interpreting patient outcomes and validates using health-related quality of life measures.
Area of Science:
- Spine surgery outcomes research
- Patient-reported outcome measures
- Clinical effectiveness research
Background:
- Minimum clinically important difference (MCID) is crucial for assessing lumbar degenerative disorder treatment.
- Health-related quality of life (HRQOL) varies by diagnostic etiology and prior care experience.
- Previous care experience may influence patient perception of improvement.
Purpose of the Study:
- Determine if MCID values differ between primary and revision lumbar fusion patients.
- Analyze MCID for Oswestry Disability Index (ODI), SF-36, and pain scales.
- Investigate the impact of prior care on perceived clinical improvement.
Main Methods:
- Prospective collection of preoperative and 1-year postoperative HRQOL data.
- Analysis of ODI, SF-36 Physical Component Summary (PCS), back, and leg pain.
- Calculation of MCID using minimum detectable change for primary and revision groups.
Main Results:
- 722 primary and 333 revision patients analyzed; no demographic differences.
- Both groups showed significant 1-year postoperative improvement.
- MCID values were highly similar between primary and revision groups for all measures.
Conclusions:
- MCID values are comparable for primary and revision lumbar fusion, simplifying clinical improvement interpretation.
- Subgroup analysis by diagnostic etiology did not alter MCID similarity.
- Study validates patient-reported HRQOLs for measuring effectiveness, independent of prior care experience.
