Debridement of Unstable Chondral Lesions During Arthroscopic Partial Meniscectomy Provides No Long-Term Benefit
Bibliographic record
Abstract
BACKGROUND: Arthroscopic partial meniscectomy (APM) for degenerative meniscal tears is one of the most common orthopaedic procedures. Surgeons often encounter chondral lesions during APM, and often debride them. The Chondral Lesions And Meniscus Procedures (ChAMP) trial found no benefit to debriding chondral lesions during APM at 1 and 5-year follow-up intervals. To gauge longer-term patient outcomes, we evaluated the original ChAMP trial patients 9 years after surgery. METHODS: We collected patient-reported outcome measures (PROMs) with the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Knee injury and Osteoarthritis Outcome Score (KOOS), visual analog scale for pain (VAS-Pain), and Short Form-36 (SF-36); performed a physical examination including evaluation of the range of motion, quadriceps circumference, and effusion; measured radiographic joint space narrowing; and recorded any subsequent surgery. We compared treatment groups (observation versus debridement) with t tests, multiple linear regression analysis, chi-square tests, and adjusted logistic regression. P values of <0.05 were considered significant. All analyses were completed using R statistical software. RESULTS: Of the 190 patients in the original ChAMP trial, 140 (64 [69.6%] of those in the observation group and 76 [77.6%] of those in the debridement group; p = 0.278) were available for outcome collection at the 9-year follow-up. The majority of patients were male (62.6%), and the average age was 63.9 ± 7.2 years at the 9-year follow-up. Of those 140 patients, 25 (17.9%) had had subsequent surgery on the index knee. Of the remaining patients, 115 completed PROMs, 106 underwent the physical assessment, and 109 underwent radiographic examination. There were no differences between the treatment groups with regard to demographics, except for preoperative weight, which was adjusted for in the modeling. There were no significant differences between the groups with respect to the WOMAC pain score (p = 0.15), other PROMs, physical assessment measurements, radiographic measurements of joint-space narrowing in the surgically treated knees, or rates of subsequent surgery. CONCLUSIONS: Data collected at 9 years, including PROMs, findings on physical examination, joint space narrowing, and rates of subsequent surgery, indicated that there was no benefit to debriding unstable chondral lesions at the time of APM. LEVEL OF EVIDENCE: Therapeutic Level I . See Instructions for Authors for a complete description of levels of evidence.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.007 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".