Predicting knee osteoarthritis radiographic progression: A multimodal diffusion approach
Authors' conclusion
KOA-Diff synthesizes future radiographs reflecting accurate structural progression, providing an interpretable tool for KOA prediction.
Study context
- Population
- People with knee OA: Osteoarthritis Initiative (OAI) dataset and a private external cohort (PUTH-KOA)external cohort n=80
- Comparison
- OAI vs PUTH-KOA
- PUTH-KOAn = 80
- Outcome
- Accuracy of synthesized future knee radiographs: joint space width error (JSWE) and binary KL-grade accuracy (early [KL ≤2] vs advanced [KL ≥3])
Methodological detailslatent diffusion model with multimodal fusion network, internal validation (OAI), external validation (PUTH-KOA), blinded expert evaluation
- Latent diffusion model with multimodal fusion network
- Internal validation (OAI)
- External validation (PUTH-KOA)
- Blinded expert evaluation
Performance
As reported in the abstract
JSWE and binary KL-grade accuracy of synthesized radiographs · over 96 months (OAI)
| Test or model | Joint space width error (JSWE) | Binary Kellgren-Lawrence (KL)-grade accuracy |
|---|---|---|
| OAI | 0.71%-1.21% | 84.0%-91.8% |
| PUTH-KOA | 2.06% | 90.0% |
Joint space width error (JSWE)
OAI0.71%-1.21%
PUTH-KOA2.06%
Binary Kellgren-Lawrence (KL)-grade accuracy
OAI84.0%-91.8%
PUTH-KOA90.0%
Further findings
| Outcome | OAI | PUTH-KOA |
|---|---|---|
| Blinded expert rating of synthesized feature accuracy (5-point scale) | ||
| Joint space narrowing | 4.162 | 4.050 |
| Osteophyte formation | 3.895 | 3.925 |
| Subchondral bone sclerosis | 3.943 | 3.775 |
Clinicians' accuracy identifying high-risk patients (KL grade increase ≥2 levels over 8 years), without vs with model assistance
- Accuracy without model assistance
- 58.3%
- Accuracy with model assistance
- 77.5%
Original publication
Predicting knee osteoarthritis radiographic progression: A multimodal diffusion approach. Osteoarthritis Cartilage. Published 31 August 2026. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →