Analysis of age, estimated creatinine clearance and pretreatment hematologic parameters as predictors of fludarabine toxicity in patients treated for chronic lymphocytic leukemia: a CALGB (9011) coordinated intergroup study
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Purpose. Fludarabine is a renally excreted agent that is an effective treatment for chronic lymphocytic leukemia (CLL), a disease predominantly of the elderly. We sought to determine whether age, renal function or pretreatment hematologic status predicted toxicity of fludarabine treatment for CLL.
Methods. We evaluated 192 patients with previously untreated B-cell CLL who were entered onto the fludarabine treatment arm (25 mg/m2 daily for 5 days every 28 days) of CALGB study 9011, an intergroup study with participation from SWOG, CTG/NCI-C and ECOG. Patients were required to have serum creatinine within 1.5 times normal. Hematologic indices and infections were recorded during the first 28-day cycle of treatment. A time-to-toxicity endpoint was evaluated over the entire course of fludarabine treatment. Creatinine clearance (CrClest) was estimated using serum creatinine, age and body mass index.
Results. The median age was 64 years (range 37–87 years) and median CrClest was 62 ml/min (range 27–162 ml/min, interquartile range 52–79 ml/min). We found no association between age and incidence of hematologic toxicity or infection during the first cycle of treatment. There was a strong association between CrClest and the time-to-toxicity endpoint. Patients with CrClest below 80 ml/min had increased incidence of toxicity during their treatment course (P<0.0001). Pretreatment anemia, thrombocytopenia and Rai stage were highly associated with the incidence of neutrophil toxicity and grade III/IV hematologic toxicities during the first cycle of treatment (P<0.0001).
Conclusions. Patient age was not an independent risk factor for fludarabine-related toxicity, but CrClest was associated with time to toxicity.
- Analysis of age, estimated creatinine clearance and pretreatment hematologic parameters as predictors of fludarabine toxicity in patients treated for chronic lymphocytic leukemia: a CALGB (9011) coordinated intergroup study
Cancer Chemotherapy and Pharmacology
Volume 50, Issue 1 , pp 37-45
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- Chronic lymphocytic leukemia Fludarabine Aging Kidney function tests Drug toxicity
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- Author Affiliations
- A1. Geriatric Research, Education and Clinical Center, Veterans Affairs Medical Center, Durham, NC, USA,
- A4. Cancer and Leukemia Group B Statistical Center, Duke University Medical Center, Durham, NC, USA,
- A2. Hematology/Oncology Division, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA,
- A5. Division of Hematology/Oncology, Long Island Jewish Medical Center, New Hyde Park, NY, USA,
- A6. Sections of Hematology/Oncology and Infectious Disease, Veterans Affairs Medical Center, Minneapolis, MN, USA,
- A8. Southwest Oncology Group, USA,
- A9. National Cancer Institute-Canada, Clinical Trials Group, Canada,
- A10. Eastern Cooperative Oncology Group, USA,
- A7. Cancer and Leukemia Group B, Chicago, IL, USA,