Abstract
Introduction
Evidence suggests that many cancer chemotherapy patients who are candidates for colony-stimulating factor (CSF) prophylaxis do not receive it or receive it inconsistent with guidelines, and that such patients have a higher risk of febrile neutropenia hospitalization (FNH). Little is known about the number and consequences of FNH by use/patterns of CSF prophylaxis in US clinical practice.
Methods
A retrospective cohort design and private healthcare claims data were employed. Study population comprised adults who received a chemotherapy course with a high-risk regimen, or an intermediate-risk regimen (if ≥1 FN risk factor present), for non-metastatic breast cancer or non-Hodgkin’s lymphoma (NHL); each chemotherapy cycle within the course and each FNH episode within the cycles were identified. Consequences included mortality, inpatient days, and costs (US$2013) during FNH. Use (yes/no) and patterns (agent, administration day/duration) of CSF prophylaxis were evaluated within cycles in which FNH episodes occurred.
Results
Among all FNH episodes (n=6,355; 109 episodes per 1,000 patients), 41.3% (95% CI: 40.1-42.5) occurred among patients who did not receive CSF prophylaxis in that cycle, and 8.8% (8.1-9.5) occurred among those who received CSF prophylaxis on the same day as chemotherapy. Among FNH episodes occurring in patients who received daily CSF agents (2% of CSF use), 56.1% (44.1-68.0) received prophylaxis <7 days during the cycle. Results for FNH consequences were comparable.
Conclusions
In this retrospective evaluation, one-half of FNH episodes, outcomes, and costs among cancer chemotherapy patients who were candidates for CSF prophylaxis occurred in those who either did not receive it or received it inconsistent with guidelines.
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Authors’ Contributions
Authorship was designated based on the guidelines promulgated by the International Committee of Medical Journal Editors (2004). All persons who meet criteria for authorship are listed as authors on the title page. The contribution of each of these persons to this study is as follows: (1) conception and design (all authors), acquisition of data (X. Li, Weycker), analysis or interpretation of data (all authors); and (2) preparation of manuscript (Atwood, Weycker), critical review of manuscript (X. Li, Tzivelekis, Garcia, Y. Li, Reiner, Lyman). The study sponsor reviewed the study research plan and study manuscript; data management, processing, and analyses were conducted by PAI, and all final analytic decisions were made by study investigators. All authors have read and approved the final version of the manuscript.
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Funding for this research was provided by Amgen Inc. to Policy Analysis Inc. (PAI).
Declaration of Funding
Funding for this research was provided by Amgen Inc. to Policy Analysis Inc. (PAI).
Declaration of Financial/Other Relationships
Derek Weycker and Mark Atwood are employed by PAI. Spiros Tzivelekis, Jacob Garcia, Yanli Li, and Maureen Reiner are employed by, and are stockholders in, Amgen Inc. Xiaoyan Li was employed by Amgen during the conduct of this research. Gary Lyman is Co-Director at the Hutchinson Institute for Cancer Outcomes Research and Professor of Medicine at the University of Washington School of Medicine.
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Weycker, D., Li, X., Tzivelekis, S. et al. Burden of Chemotherapy-Induced Febrile Neutropenia Hospitalizations in US Clinical Practice, by Use and Patterns of Prophylaxis with Colony-Stimulating Factor. Support Care Cancer 25, 439–447 (2017). https://doi.org/10.1007/s00520-016-3421-x
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DOI: https://doi.org/10.1007/s00520-016-3421-x