Journal
BREAST CANCER RESEARCH AND TREATMENT
Volume 131, Issue 2, Pages 483-490Publisher
SPRINGER
DOI: 10.1007/s10549-011-1799-1
Keywords
Breast cancer; Adjuvant chemotherapy; Neutropenia Prognosis; Time-dependent variable
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Funding
- Science Technology Development Project of Colleges and Universities in Tianjin [20090139]
- Tianjin Medical University Cancer Institute and Hospital
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Neutropenia is one of the most important dose-limiting toxicities and often the reason for dose reduction. In this study we aimed to assess whether chemotherapy-induced neutropenia could be a marker of efficacy and associate with increased survival. Data from a retrospective survey for early breast cancer patients in our hospital were reviewed. Three hundred and thirty-five patients who had been treated with six cycles of cyclophosphamide, epirubicin, and fluorouracil (CEF) were studied. The association between chemotherapy-induced neutropenia and overall survival (OS) was assessed. According to a multivariate Cox model with time-varying covariates, hazard ratios of death were 0.434 (95% confidence interval (CI), 0.298-0.634; P < 0.001) for patients with mild neutropenia, and 0.640 (95% CI, 0.42-0.975; P = 0.038) for those with severe neutropenia. Neutropenia occurring in early breast cancer patients is an independent predictor of increased survival. These findings suggest that neutropenia in patients who receive chemotherapy is strongly associated with a better prognosis.
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