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• W2952805778 abstract "1036 Background: In MBC P the benefit of CT after the 1st line (L) is poorly defined. We evaluated activity of subsequent L of CT in different BS of MBC. Methods: MBC P treated in our center from 2007 to 2012 with ER, PgR and HER2 on primary tumor and at least 1 L of CT for MBC were evaluated. P were classified as Luminal A (ER and/or PgR +, HER2 -, Ki67≤14%), Luminal B (ER and/or PgR +, HER2 -, Ki67>14%), HER2+ (HER2+, any ER/PgR) and Triple-Negative ( ER-, PgR- and HER2-). Time on CT was calculated from the start of the 1st L to the end of the last L. Statistical analyses included Chi-square and Kruskal-Wallis tests, Kaplan-Meier curves and log-rank tests, and multivariate logistic regressions. Results: 207 P were identified, 52 were excluded because HER2 was unknown (19) or they did not receive any CT (33). Median follow-up was 31.4 months (m). The median number (N) of CT L was 2 (range 1-10). N of CT L and clinical benefit (CB) for every BS were reported in table. CB was inferior in TN P as compared with the other ones in 1st and in 2nd L ( p=.068 and p=.084 respectively in 1st and 2nd L). From 3rd L onward all P showed the same CB independently from BS. Time on CT related to median survival (S) for every BS was the same. At multivariate analysis the characteristics independently associated with a greater probability of receiving more than 4 CT L were age < 50 years (p=.021), HER2+ or TN disease (p=.027) and site of metastasis other than lung (p=.047). Conclusions: Our analysis showed that, despite the same time spent on CT, TN P received less benefit from 1st and 2nd L CT than other BS. On the other hand, young HER2+ P were more likely to receive multiple L of CT with a significant impact on median S (p=.044). [Table: see text]" @default.
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• W2952805778 date "2013-05-20" @default.
• W2952805778 modified "2023-10-07" @default.
• W2952805778 title "Activity and duration of chemotherapy (CT) in different biologic subtype (BS) in metastatic breast cancer (MBC) patients (P)." @default.
• W2952805778 doi "https://doi.org/10.1200/jco.2013.31.15_suppl.1036" @default.
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