Associations Between Indices of Quadriceps Strength and Self-Reported Function in Individuals After Knee Meniscal Surgery
Bibliographic record
Abstract
Persistent quadriceps weakness is common following surgical knee meniscectomy or meniscal repair procedures. Quadriceps strength normalized to body mass (QSBM) is known to associate with self-reported function in patients with a history of knee injury. Quadriceps strength limb symmetry index (QLSI) has emerged as a predictor of lab-based biomechanical measures and physical function in similar populations. However, it is unclear how these measures associate with self-reported function following meniscal surgery. This information is critical for determining the best clinical indicators of function in this population. PURPOSE: Determine the associations of QSBM and QLSI with self-reported function in patients with a history of meniscal surgery. METHODS: Sixteen patients with a history of meniscal surgery participated (11F, 5M, 29.75±11.79yrs, 174.23±11.22cm, 95.06±28.38kg). QSBM and QLSI were measured during maximal voluntary isometric contractions collected with an isokinetic dynamometer at 90° of knee flexion. The mean torque of three trials was recorded and normalized to body mass (Nm/kg) for use in our QSBM analyses. QLSI was calculated as the ratio of the surgical to non-surgical limb multiplied by 100, recorded as percent for our analyses. Self-reported function was determined via the International Knee Documentation Committee (IKDC) subjective form, and the disease-specific Western Ontario Meniscal Evaluation Tool (WOMET) aggregate score. Both questionnaires were recorded as percentages, with larger percentages representing a greater level of function. Spearman’s rank correlations were used to determine associations between QSBM and QLSI with IKDC and WOMET scores. Alpha level was set a-priori P ≤ 0.05. RESULTS: QSBM (2.13±0.91) was strongly associated with IKDC (74.47±21.08; ρ=0.753, P=0.001) and WOMET (75.44±23.34; ρ=0.868, P<0.001), whereas QLSI (91.81±20.44) moderately associated with IKDC (ρ=0.515, P=0.041) scores. CONCLUSION: QSBM strongly associated with self-reported function and may be developed into a clinical indicator of high function following meniscal surgery. The strong association between QSBM, WOMET and IKDC suggests that maximizing strength in an effort to allow individual patients to support body mass is important for improving self-reported function.
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How this classification was reachedexpand
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 | 0.006 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.000 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".