Hospitalization and surgical rates in patients with Crohn's disease treated with infliximab: a matched analysis
Bibliographic record
Abstract
PURPOSE: The majority of subjects with Crohn's Disease (CD) will be hospitalized and will receive surgery for their disease. These interventions account for most of the direct costs of the disease. We sought to explore the association between infliximab use and CD-related surgery and hospitalizations. METHODS: We obtained patient-level health claims between 1996 and 2007 from the Régie de l'Assurance Maladie du Québec (RAMQ), a Canadian provincial health care insurer. Subjects who were i) enrolled in the RAMQ for at least 2 years, ii) received prescription drug benefits for each year of enrolment and iii) were identified as having CD using a validated algorithm were eligible for the study. For each subject treated with infliximab, up to two closely matched comparison subjects were selected using propensity score methods. We compared time to first CD-related intra-abdominal surgery or hospitalization in infliximab users and non-users. RESULTS: We matched 338 infliximab users (mean age 34, 45% male) to at least one comparison subject using propensity score matching. Subjects who received infliximab had a significantly lower risk of experiencing a CD-related intra-abdominal surgery (hazard ratio [HR] = 0.64; 95% confidence interval [CI] 0.51-0.81) or hospitalization (HR = 0.73; 95% CI 0.63-0.85). Infliximab users also experienced lower rates of hospitalized days (Rate Ratio = 0.69; 95% CI 0.49-0.97). CONCLUSIONS: Our results support the real world effectiveness of infliximab therapy in reducing CD-related surgeries and hospitalizations.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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) | 0.000 | 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 teacher head, 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".