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Breast Cancer Research and Treatment

, Volume 89, Issue 1, pp 47–54 | Cite as

The effect of age, race, tumor size, tumor grade, and disease stage on invasive ductal breast cancer survival in the U.S. SEER database

  • Jarrett Rosenberg
  • Yen Lin Chia
  • Sylvia Plevritis
Report

Abstract

Purpose. To examine the effect of patient and tumor characteristics on breast cancer survival as recorded in the U.S. National Cancer Institute’s Surveillance, Epidemiology, and End Results (SEER) database from 1973 to 1998.

Methods. A sample of 72,367 female cases from 1973 to 1998 aged 21-- 90 years with invasive ductal breast cancer were examined with Cox proportional hazards regression to determine the effect of age at diagnosis, race, tumor size, tumor grade, disease stage, and year of diagnosis on disease-specific survival.

Results. Larger tumor size and higher tumor grade were found to have large negative effects on survival. Blacks had a 47 % greater risk of death than whites. Year of diagnosis had a positive effect, with a 15 % reduction in risk for each decade in the time period under study. The effects of patient age and disease stage violated the proportional hazards assumption, with distant disease having much poorer short-term survival than one would expect from a proportional hazards model, and younger age groups matching or even falling below the survival rate of the oldest group over time.

Conclusion. Tumor size, grade, race, and year of diagnosis all have significant constant effects on disease-specific survival in breast cancer, while the effects of age at diagnosis and disease stage have significant effects that vary over time.

Keywords

Cox regression ductal carcinoma invasive breast cancer proportional hazards SEER 

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Copyright information

© Springer 2005

Authors and Affiliations

  • Jarrett Rosenberg
    • 1
    • 2
  • Yen Lin Chia
    • 3
  • Sylvia Plevritis
    • 1
  1. 1.Department of RadiologyStanford UniversityStanfordUSA
  2. 2.Clement & AssociatesRedwood CityUSA
  3. 3.Department of Management Science and EngineeringStanford UniversityUSA

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