Meaningful changes in physical function and pain in patients with knee osteoarthritis
Why this work is in the frame
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Bibliographic record
Abstract
BACKGROUND: This study aims to establish meaningful within-person change (MWPC) thresholds for the Total Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC®), its Physical Function (PF) subscale, and the Visual Analog Scale (VAS) for Pain, in patients with knee osteoarthritis (OA). A secondary objective is to evaluate the effectiveness of a single injection of autologous culture-expanded adipose tissue-derived mesenchymal stem cells (ADMSCs) using these thresholds. METHODOLOGY: The study included 252 patients with knee OA enrolled in a clinical trial. An anchor-based predictive modeling approach, using KOOS-12, SF-36, and IKDC scores with literature-based cut-offs, was applied to determine MWPC thresholds for WOMAC and VAS Pain. MWPC thresholds were derived from both the ADMSCs injection and Control (autoserum) groups at 3- and 6-month follow-ups. Treatment effectiveness was assessed by comparing MWPC range with between-group differences and within-person changes. RESULTS: MWPC thresholds were identified as follows: 5–17 points for WOMAC Total, 4–12 points for WOMAC PF, and 8–14 points for VAS Pain (all on 0–100 scales). The adjusted differences between the ADMSCs injection and Control (autoserum) groups of all three measures (3 months: WOMAC Total 5.9, WOMAC Function 4.2, VAS Pain 8.6; 6 months: WOMAC Total 9.3, WOMAC Function 6.5, VAS Pain 11.7) were within each corresponding MWPC threshold range. CONCLUSIONS: The proposed MWPC thresholds could be beneficial for healthcare professionals as a tool to identify meaningful change in physical function and pain in response to treatment and evaluate the meaningfulness of treatment benefits.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it