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Originally published as JCO Early Release 10.1200/JCO.2005.02.1436 on December 19 2005 © 2006 American Society of Clinical Oncology. Similar Outcomes Between African American and Non–African American Patients With Extensive-Stage Small-Cell Lung Carcinoma: Report From the Cancer and Leukemia Group BFrom the Wake Forest University School of Medicine, Winston-Salem; University of North Carolina at Chapel Hill, Chapel Hill; Cancer and Leukemia Group B Statistical Center, Duke University, Durham, NC; Ohio State University, Columbus OH; Dana Farber Cancer Institute, Boston MA; University of Tennessee–Memphis, Memphis TN; University of Chicago, Chicago IL; and Medical University of South Carolina, Charleston, SC Address reprint requests to A. William Blackstock, MD, Department of Radiation Oncology, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC 27157; e-mail: ablackst{at}wfubmc.edu Purpose Among patients with small-cell lung carcinoma, African Americans have lower survival rates than non–African Americans. We investigated whether the disparity in survival would persist when patients were treated with similar therapies (ie, phase II/III Cancer and Leukemia Group B [CALGB] trials). Patients and Methods We assessed 995 patients (928 non–African American and 67 African American) receiving chemotherapy in CALGB studies for extensive-stage small-cell lung cancer (ES-SCLC). Clinical and demographic characteristics, treatment received, and survival data were obtained from the CALGB database. The Cox proportional hazards model was used to assess the effect of race/ethnicity on survival after adjustment for other known prognostic factors. All statistical tests were two sided. Results The unadjusted survival distribution of African American patients was not significantly different from that of non–African American patients; median survival was 11.5 months (95% CI, 9.4 to 13.4 months) for African American patients versus 9.9 months (95% CI, 9.6 to 10.3 months) for non–African American patients. Multivariable adjustment for the effect of treatment arm, histology, and metastatic site at presentation did not alter the outcome for African American patients. Survival was similar even though African American patients were more likely to have a poorer performance status, present with significant weight loss, and be Medicaid recipients (20% v 6%), which is an indicator of lower socioeconomic status. Conclusion African American patients tended to present with prognostic features associated with a worse survival. However, when offered equivalent therapy, the outcome for African American patients was the same as that observed for non–African American patients. Supported in part by Public Health Service Grant No. CA31946 from the National Cancer Institute (NCI), National Institutes of Health, Department of Health and Human Services, to the Cancer and Leukemia Group B (Richard L. Schilsky, MD, Chairman). Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the NCI. Authors disclosures of potential conflicts of interest and author contributions are found at the end of this article.
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Copyright © 2006 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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