Objective: To determine actual first-line treatment patterns for metastatic triple-negative breast cancer (mTNBC) in the United States by analyzing records of patients treated in community practices.
Methods: We derived our data from the Georgia Cancer Specialist Database (GCSD) (2003-2008) and the International Oncology Network’s (ION) Treatment and Outcomes Database (2003-2008). In both data sets, patients with stage IV TNBC were selected and followed for up to 1 year after the initial mTNBC diagnosis. Chemotherapy was deemed first-line if initiated within 120 days of mTNBC diagnosis.
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