P0456 Peripheral blood eosinophilia: A novel predictor of disease severity in Inflammatory Bowel Disease - A single-center retrospective study
Bibliographic record
Abstract
Abstract Background Identifying early predictors of disease severity in inflammatory bowel diseases (IBD) remains crucial for optimizing therapeutic strategies. We investigated whether peripheral blood eosinophilia (PBE) at diagnosis could predict long-term outcomes in adult IBD patients. Methods We conducted a retrospective analysis of 128 IBD patients (78 Crohn’s disease [CD], 50 ulcerative colitis [UC]) diagnosed between 2003 and 2021, comparing them with 49 non-IBD controls. PBE was defined as an eosinophil count exceeding 0.5 × 109/L. We defined severe disease course as meeting any of these criteria: corticosteroid dependency, requirement for multiple biologic therapies (≥2 different classes), or surgical intervention. Disease location, behavior, and severity were classified according to Montreal classification. Outcomes were analyzed using Cox proportional hazard models. Results PBE was detected in 17 IBD patients (13.3%) compared to 2 controls (4.1%, p<0.001). UC patients showed higher PBE prevalence with 8 cases (16%) versus 9 CD patients (11.5%). Regarding disease location in CD patients with PBE, 5 patients (55.5%) had ileocolonic involvement, 3 (33.3%) had isolated ileal disease, and 1 (11.1%) had isolated colonic disease. In UC patients with PBE, 6 (75%) had extensive colitis. During the follow-up period (median 5.2 years), PBE-positive patients demonstrated significantly worse outcomes: 14 out of 17 (82.3%) developed severe disease course compared to 45 out of 111 (40.5%) PBE-negative patients. PBE-positive patients required more frequent hospitalizations (71% vs 35%), had higher rates of corticosteroid use (88% vs 45%), and increased need for biological therapy (76% vs 38%). Notably, 65% of PBE-positive patients developed corticosteroid dependency compared to 30% in the PBE-negative group. Multivariate analysis confirmed PBE as an independent predictor of severe disease course (HR = 1.49, 95% CI: 1.38-1.62, p<0.001). Conclusion This study establishes PBE as a valuable prognostic marker for IBD severity. The presence of eosinophilia at diagnosis strongly correlates with a more aggressive disease course, suggesting the need for early therapeutic optimization in these patients. These findings not only provide a simple and accessible prognostic tool but also highlight eosinophils as a potential therapeutic target in IBD management. Further prospective studies are warranted to validate these findings and explore eosinophil-targeted therapies.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".