Authors: Lu Chen Hannah M Linden Benjamin O Anderson Christopher I Li
Publish Date: 2014/08/28
Volume: 147, Issue: 3, Pages: 609-616
Abstract
Improvement in breast cancer survival has been observed in recent decades in the US but it is unclear if similar survival gains are consistent across breast cancer subtypes especially with regards to more advanced stages of the disease Data were from 13 populationbased cancer registries participating in the surveillance epidemiology and end results SEER program consisting of women between 20 and 79 years of age diagnosed with invasive breast cancer between 1992 and 2008 2year 1992–2008 and 5year 1992–2006 breast cancer causespecific survival rates were calculated and stratified by estrogen receptor ER/progesterone receptor PR status stage and race Annual percent changes in survival rates were assessed From 1992 through 1998–1999 5 and 2year causespecific survival rates significantly improved across ER+/PR+ ER−/PR− and ER+/PR− subtypes with an annual increase ranging from 05 to 10 in the 5year rates From 1998–1999 to 2006 different patterns were observed by ER/PR subtypes with survival rates slightly improving for ER+/PR+ continuing to improve at a rate of 05 per year for ER−/PR− and dropping 03 annually for ER+/PR− No significant survival gains were experienced by patients with ER−/PR+ cancer during the study period In terms of advanced diseases greatest annual increases in survival rates were seen for patients with stage III–IV ER+/PR+ and ER−/PR− tumors but less progress was observed for advanced ER+/PR− breast cancers Steady improvements in survival rates for breast cancer have been achieved over the past several decades However 5year survival rates for stage IV disease remained dismally below 20 for most ER/PR subtypesThis work was supported in part by NCI N01PC95001 The dataset used for this analysis was obtained from the Surveillance Epidemiology and End Results SEER Program PublicUse Data 19922008 NCI Department of Cancer Control and Population Sciences Surveillance Systems Branch released April 2014 based on the November 2013 submission The NCI and SEER program were not involved in the design and conduct of this study in the analysis or interpretation of the data or in the preparation and review of this article
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