Time to Splenectomy Failure in Patients with Recurrent or Refractory Chronic Immune Thrombocytopenic Purpura.
Notice bibliographique
Résumé
Abstract Abstract 3522 Poster Board III-459 INTRODUCTION Splenectomy has been perceived as a potentially curative treatment for patients with chronic immune thrombocytopenic purpura (ITP). Historical data demonstrate that the risk of relapse is between 33% and 50% in patients with long-term follow-up (Fabris, Br J Haematol, 2001; Schwartz, Am J Hematol, 2003). No clear pattern of time to relapse after splenectomy has been described which complicates the decision making process for physicians who are considering this irreversible therapeutic option. Splenectomized patients are at risk for: early and late surgical complications (Kojouri, Blood, 2004; Portielje, Blood, 2001); infections secondary to impaired immunity (BCSH 1996; Moffett, JAAPA, 2009; Oren 2008); thrombotic and/or cardiovascular disease (Schilling, J Thromb Haemost, 2008; Fontana, Thromb Res, 2008); and pulmonary hypertension (Schilling, J Thromb Haemost, 2008; Bonderman, Circulation, 2007). Splenectomy requires preoperative vaccinations, general anesthesia with antibiotic prophylaxis, and subsequent long-term vigilance with early antibiotic treatments. These factors not only impact the utilization of medical resources but also, due to clinically problematic outcomes, may lead to a requirement for additional treatments. OBJECTIVE: To describe the time from splenectomy to splenectomy failure among patients with chronic ITP enrolled in the eltrombopag clinical program. METHODS: Date of splenectomy and prior medications for ITP were reviewed in patients enrolled in 5 clinical trials using eltrombopag. Splenectomy was considered to have failed upon administration of the first treatment for ITP after surgery or when patients were not able to taper or interrupt concomitant ITP treatments in the 30 days following splenectomy. Of the 495 patients enrolled in the ITP program, 192 (39%) were splenectomized and 185 patients were evaluable for this analysis. The analysis does not describe overall effectiveness of splenectomy as the patient population is limited to splenectomy failure patients who required additional treatment for their ITP. RESULTS: Fifty-one percent of patients required ITP medications within 1 year of splenectomy (Figure 1). Five years after splenectomy, 27% of patients still had a response; this percentage decreased to 18% after 10 years. CONCLUSION: This retrospective analysis demonstrates that success of splenectomy appears to diminish over time. In patients requiring further ITP treatment, most splenectomized patients who relapse do so within 5 years. The treatment of chronic ITP has advanced as more data on the safety and efficacy of new medications like the thrombopoietin receptor agonists have become available. As physicians and patients become more familiar with the risks and benefits of all treatments, options other than splenectomy may be preferred for certain patients. Disclosures: Cheng: GlaxoSmithKline: Research Funding. Gernsheimer:GlaxoSmithKline: Honoraria, Research Funding; Amgen: Honoraria, Research Funding. Olney:GlaxoSmithKline: Consultancy, Membership on an entity's Board of Directors or advisory committees; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees. Bussel:Genzyme: Research Funding; GlaxoSmithKline: Equity Ownership, Membership on an entity's Board of Directors or advisory committees, Research Funding; Cangene: Research Funding; Amgen: Equity Ownership, Membership on an entity's Board of Directors or advisory committees, Research Funding; Immunomedics: Research Funding; Ligand: Membership on an entity's Board of Directors or advisory committees, Research Funding; Eisai, Inc: Research Funding; Sysmex: Research Funding; Scienta: Speakers Bureau; Shionogi: Membership on an entity's Board of Directors or advisory committees. Shah:GlaxoSmithKline: Employment. Brainsky:GlaxoSmithKline: Employment. Grotzinger:GlaxoSmithKline: Employment. Aivado:GlaxoSmithKline: Employment.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».