Ultrasonographic Evaluation of the Anterior Chest Wall in Spondyloarthritis: A Prospective and Controlled Study
Bibliographic record
Abstract
OBJECTIVE: To determine the prevalence and type of ultrasonographic (US) lesions of the anterior chest wall (ACW) in cases of spondyloarthritis (SpA). METHODS: This monocentric, prospective, and controlled study included patients consulting for SpA (Assessment of Spondyloarthritis International Society criteria) and control subjects. Clinical (pain and swelling) and US assessments (synovitis, joint effusion, erosion, ankylosis, margin narrowing, or Doppler signal) were performed on the sternoclavicular (SCJ) and the manubriosternal (MSJ) joints. The main characteristics of SpA were recorded [disease duration, biologic features, Ankylosing Spondylitis Disease Activity Score (ASDAS), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), radiographic and extraarticular involvement]. RESULTS: The study included 131 patients with SpA and 49 control subjects (same age and sex ratio). Clinical and US involvement of ACW were found in, respectively, 39% and 35.5% of SpA and in 12% and 14.3% of controls (p < 0.01). US highlighted erosions (34 vs 0), margin narrowing (12 vs 0), power Doppler activity (18 vs 2; p < 0.05), and ankylosis of the MSJ (24 vs 3). US involvement was associated with disease duration (14.9 vs 11.1 years; p = 0.04), age (45 vs 41 years; p = 0.004), radiographic change of sacroiliac joint (p = 0.05), and presence of inflammatory bowel disease (IBD; p = 0.03). No associations were found with HLA-B27, psoriasis, enthesitis, uveitis, or clinical involvement of ACW. Clinical involvement is associated with a higher BASDAI (47 vs 32; p = 0.0009) and ASDAS (2.9 vs 2.2; p = 0.006). CONCLUSION: US involvement of ACW is frequent in SpA (36.5%), mainly with erosion of SCJ and ankylosis of MSJ. It is associated with disease duration, radiographic sacroiliitis, and IBD.
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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 | 0.003 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".