Dose Escalation Patterns and Associated Costs of Advanced Therapies for Ulcerative Colitis in France and the United Kingdom: A Retrospective Database Analysis
Bibliographic record
Abstract
Tamás Treuer,1 Melissa Richards,1 Can Mert,2 Endip Dhesi,1 Lidia Silva,3 Yubo Tan,4 Sami Hoque5 1International Medical Affairs, Eli Lilly and Company, Indianapolis, IN, USA; 2Statistics, HaaPACS GmbH, Schriesheim, Germany; 3RWE, TFS HealthScience, Madrid, Spain; 4Biostatistics, TFS HealthScience, Toronto, Canada; 5Gastroenterology, Barts Health NHS Trust, London, UKCorrespondence: Tamás Treuer, Eli Lilly and Company, 893 Delaware Street, Indianapolis, IN, USA, Email treuer_tamas@lilly.comBackground: Dose escalation to optimize advanced therapies is common in ulcerative colitis (UC) to avoid intra-class or inter-class drug switching and maintain clinical response and has impact on costs. Given the limited real-world data available, this study aims to understand real-world dose escalation UC advanced therapies patterns in France and United Kingdom [UK].Methods: Retrospective study in adult patients with moderate-to-severe UC starting an advanced UC therapy (adalimumab [ADA], golimumab [GOL], infliximab [IFX], tofacitinib [TOF], ustekinumab [UST], or vedolizumab [VED]) with first prescription (and/or dispensation for France) between January 2017 and February 2022 (ie advanced UC therapy new users, by excluding patients who used any of these drugs in the previous 12 months to their index date). Proportions of patients with dose escalation/de-escalation (± 20% versus Summary of Product Characteristics) after maintenance date were estimated using Kaplan–Meier (KM) survival analyses. Clinical response, healthcare resource utilization (HRU) and direct costs related to UC were also analyzed.Results: Within 6 months after start of maintenance, rate of at least one dose escalation was 74.1%. Overall, 83.9– 89% of patients had dose escalation within the 12– 24 months, respectively, and 61.6% had clinical response [ranging from 56.3% (ADA) to 77.0% (IFX)]. Direct annual HRU costs related to UC ranged between 7426 (IFX) EUR and 22,265 (UST) in France, with mean 11,181 EUR in the dose-escalation group vs 8323 EUR in the de-escalation group (+11.5%). In the UK costs ranged between 5006 (ADA) EUR and 11,975 (UST).Conclusion: Dose escalation of UC advanced therapies is a common strategy to avoid treatment-switching. Despite dose escalations and their cost to the system, a proportion of patients fail to achieve clinical response. This study highlights the need for more efficacious, durable treatments for moderate-to-severe UC patients, as the initiation of the advanced therapies did not reduce overall systemic/rectal corticosteroid burden.Keywords: ulcerative colitis, dose escalation, biologics, economic cost, healthcare resource use (HRU)
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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 | 0.012 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.003 | 0.006 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.002 | 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".