Study on Bone Mineral Density Around the Knee in Postmenopausal Women with Osteoarthritis and Osteoporosis
Bibliographic record
Abstract
Background: Osteoporosis (OP) and knee osteoarthritis (KOA) are common comorbidities in postmenopausal women, yet the relationship between OP and localized bone mineral density (BMD) around the knee remains unclear. This study investigated the effect of concomitant OP on periarticular BMD and its associations with the Western Ontario and McMaster University Osteoarthritis Index (WOMAC), radiographic severity, and hip-knee-ankle (HKA) angle in postmenopausal women with KOA. Methods: In this cross-sectional study, 117 postmenopausal women were classified into a KOA combined with OP group (n=59) and a KOA-only group (n=58) based on dual-energy X-ray absorptiometry (DXA) T-scores. All participants underwent dual-energy computed tomography (DECT) to quantify BMD around the distal femur, proximal tibia, and patella; weight-bearing radiographs to assess Kellgren-Lawrence (K&L) grade and HKA angle; and the WOMAC questionnaire to evaluate pain and joint function. Results: Patients with KOA combined with OP demonstrated significantly lower knee BMD than those with KOA alone (P < 0.001). This reduction in BMD was more pronounced with increasing OP severity. Notably, even after adjusting for pain levels, BMD remained significantly lower in the KOA combined with OP group (P < 0.05). Furthermore, medial knee BMD in the KOA combined with OP group exhibited an inverted U-shaped relationship with K&L grade, peaking at grade III before declining. In contrast, BMD increased progressively with K&L grade in the KOA group. A significant inverse correlation was also observed between the HKA angle and medial knee BMD in the KOA combined with OP group, suggesting greater bone loss with increasing valgus deformity. Conclusion: Postmenopausal women with KOA combined with OP have markedly lower periarticular BMD, associated with more severe pain, distinctive radiographic changes, and poorer alignment. These findings highlight the need for active bone preservation and OP management in KOA patients to alleviate symptoms and potentially slow disease progression.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.001 | 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".