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09.05.2017 | Review

Methodology of phase II clinical trials in metastatic elderly breast cancer: a literature review

verfasst von: B. Cabarrou, L. Mourey, F. Dalenc, L. Balardy, D. Kanoun, H. Roché, J. M. Boher, M. E. Rougé-Bugat, Thomas Filleron

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 3/2017

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Abstract

Purpose

As the incidence of invasive breast cancer will increase with age, the number of elderly patients with a diagnosis metastatic breast cancer will also rise. But the use of cytotoxic drugs in elderly metastatic breast cancer patients is not systematic and is dreaded by medical oncologists. The need for prospective oncologic data from this population seems increasingly obvious. The main objective of this review is to investigate design and characteristics of phase II trials that assess activity and feasibility of chemotherapies in elderly advanced/metastatic breast cancer patients.

Methods

An electronic search in PUBMED allowed us to retrieve articles published in English language on phase II trials in elderly metastatic breast cancer between January 2002 and May 2016. Sixteen publications were finally included in this review.

Results

The primary endpoint was a simple, a composite, and a co-primary endpoints in 11, three, and two studies, respectively. Efficacy was the primary objective in 15 studies: simple (n = 10), composite (n = 3), co-primary endpoints (n = 2). Composite or co-primary endpoints combined efficacy and toxicity. Thirteen studies used multistage designs.

Conclusions

Only five studies evaluated the feasibility, i.e., to jointly assess efficacy and tolerance to treatment (toxicity, quality of life, etc) as primary endpoint. Development of elderly specific phase III clinical trials might be challenging, it therefore seems essential to conduct phase II clinical trials evaluating jointly efficacy and toxicity in a well-defined geriatric population. Use of multistage designs that take into account heterogeneity would allow to identify a subpopulation at interim analysis and to reduce the number of patients exposed to an inefficient or a toxic treatment regimen. It is crucial to evaluate new therapies (targeted therapies, immunotherapies) using adequate methodologies (Study design, endpoint).

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Titel: Methodology of phase II clinical trials in metastatic elderly breast cancer: a literature review
verfasst von: B. Cabarrou
L. Mourey
F. Dalenc
L. Balardy
D. Kanoun
H. Roché
J. M. Boher
M. E. Rougé-Bugat
Thomas Filleron
Publikationsdatum: 09.05.2017
Verlag: Springer US
Erschienen in: Breast Cancer Research and Treatment / Ausgabe 3/2017
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI: https://doi.org/10.1007/s10549-017-4278-5

Springer Medizin

Methodology of phase II clinical trials in metastatic elderly breast cancer: a literature review