P644 Post-operative Crohn’s disease recurrence in Glasgow: How common is it and does deprivation matter?
Bibliographic record
Abstract
Abstract Background 50% of patients with Crohn’s disease (CD) will have surgery within the first 10 years, with 35% requiring additional surgery in the following decade. The REMIND cohort-linked male gender, smoking and previous resection to recurrence1. The link between CD and deprivation is debated, while its influence on recurrence is unknown. We aimed to define our local post-operative CD population, highlighting recurrence rates and associated risk factors. Methods CD resections between 2008 and 2014 were identified from NHS Greater Glasgow and Clyde Pathology Archive. Data including gender, age at diagnosis/resection, Montreal classification and smoking status was obtained from the Electronic Patient Record (EPR). Scottish Index of Multiple Deprivation (SIMD) score was determined by postcode and was ranked 1–5 (most to least deprived). Five years of follow-up data were collected. The type of recurrence was recorded as clinical recurrence - symptom flare requiring a course of steroids or inpatient admission; biochemical recurrence—faecal calprotectin >250 µg/l; endoscopic recurrence; or surgical recurrence—the need for further Crohn’s disease-related surgery. Results 304 patients (59.5% female) were included. Median age at diagnosis was 29 (range 3–82 years) and at resection was 43 (range 17–85 years). 52.9% of patients were never-smokers, 16.5% were ex-smokers and 30.6% were current smokers. 33.6% of patients had a SIMD score of 1. Eighty-two per cent had ileal, colonic or ileocolonic involvement. 46.7% of patients had clinical recurrence, 48.7% biochemical recurrence and 31.6% endoscopic recurrence. 15.8% required further surgery for CD. For clinical recurrence, younger age at diagnosis (p = 0.012, and younger age at resection (p = 0.002) were significant determinants. Gender, smoking and SIMD were not significantly associated with recurrence. Chemical recurrence showed similar associations. Similarly, for surgical recurrence, younger age at diagnosis (p = 0.030, and younger age at resection (p = 0.003) were significant determinants. Male gender was the only risk factor for endoscopic recurrence (OR=1.88, 95% CI: 1.13–3.08). Conclusion Our data suggest rates of post-operative recurrence in line with published data. Risk factors were similar to those identified in the REMIND study, with younger age at diagnosis/resection associated with higher rates of recurrence. Our data suggest sociodemographic deprivation does not influence recurrence rates; however,, more work is needed to validate this. References
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.002 | 0.004 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".