Furthermore, there was a significantly longer overall survival time with 1 year of adjuvant Trastuzumab in the BCIR 006, B-31, N9831 and a clear trend in the other studies.
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Adjuvant trastuzumab in the treatment of her-2-positive early breast cancer: a meta-analysis of published randomized trials.
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In an intent-to treat analysis with a combined median follow-up of two years (2.4 years for B-31 and 1.5 years for N-9831), there was a highly significant 52 percent reduction in the risk of disease recurrence with sequential trastuzumab (three-year DFS 87 versus 75 percent, HR 0.48), and despite the short follow-up, a 33 percent reduction in the risk of death (three-year OS 94.3 versus 91.7 percent, HR 0.67) [ 11 ].