Evidence map›Paper›PMID 31112617›Full record

ArticleBritish journal of clinical pharmacology2019

Optimizing the dose in patients treated with imatinib as first line treatment for gastrointestinal stromal tumours: A cost-effectiveness study.

Sander Zuidema, Ingrid M E Desar, Nielka P van Erp, Wietske Kievit

Abstract read
In one paragraph

Article in British journal of clinical pharmacology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  10. Precision Dosing of Targeted Therapies Is Ready for Prime Time.Clinical cancer research : an official journal of the American Association for Cancer Research · 2021
    Article
  11. On precision dosing of oral small molecule drugs in oncology.British journal of clinical pharmacology · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Sander ZuidemaRadboud Institute for Health Sciences, Radboud UMC, Nijmegen, The Netherlands.
Ingrid M E DesarDepartment of Medical Oncology, Radboud UMC, Nijmegen, The Netherlands.
Nielka P van ErpDepartment of Pharmacy, Radboud Institute for Health Sciences, Radboudumc, Nijmegen, The Netherlands.ORCID 0000-0003-1553-178X
Wietske KievitRadboud Institute for Health Sciences, Radboud UMC, Nijmegen, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsPatients with metastatic gastrointestinal stromal tumours (GIST) are treated in first line with the oral tyrosine kinase inhibitor, imatinib, until progressive disease. With this fixed dosing regimen, only approximately 40% of patients reach adequate plasma levels within the therapeutic index. Therapeutic drug monitoring (TDM) is a solution to reach plasma levels within the therapeutic index. However, introducing TDM will also increase costs, due to prolonged imatinib use and laboratory costs. The aim of this study was to evaluate the cost-effectiveness of TDM in patients with metastatic/unresectable GIST treated with imatinib as a first line treatment, compared with fixed dosing.

methodsA survival model was created to simulate progression, mortality and treatment costs over a 5-year time horizon, comparing fixed dosing vs TDM-guided dosing. The outcomes measured were treatments costs, life-years and quality-adjusted life-years.

resultsTotal costs over the 5-year time horizon were estimated to be €106 994.85 and €150 477.08 for fixed dosing vs TDM-guided dosing, respectively. A quality-adjusted life year gain of 0.74 (95% confidence interval 0.66-0.90) was estimated with TDM-guided dosing compared to fixed dosing. An average incremental cost-effectiveness ratio of €58 785.70 per quality-adjusted life year gained was found, mainly caused by longer use and higher dosages of imatinib.

conclusionBased on the currently available data, this analysis suggests that TDM-guided dosing may be a cost-effective intervention for patients with metastatic/unresectable GIST treated with imatinib which will be improved when imatinib losses its patency.

Indexed as

Cost-Benefit AnalysisAntineoplastic AgentsChemotherapy, AdjuvantComputer SimulationDose-Response Relationship, DrugDrug CostsDrug MonitoringGastrointestinal NeoplasmsGastrointestinal Stromal TumorsHumansImatinib MesylateMarkov ChainsModels, EconomicProgression-Free SurvivalQuality-Adjusted Life YearsAntineoplastic AgentsImatinib Mesylatecost-effectivenessfixed dosinggastrointestinal stromal tumoursimatinibtherapeutic drug monitoring

Identifiers

PMID31112617
PMCPMC6710511

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.