Reduced mortality for women with mammography-detected breast cancer in east Denmark and south Sweden

Research output: Contribution to journalArticle

Abstract

The 5-year relative survival from breast cancer in Denmark is 10 percentage points lower than in Sweden. This difference has been demonstrated previously as being caused partly by more involved lymph nodes and larger tumours in Denmark. Sweden has had nationwide mammography-screening coverage since 1991, whereas this is still in its infancy in Denmark. In the search for an explanation for the remaining survival difference, patient delay was a likely candidate. This study compared patient delay and mammography-detection between two national regions. Data on patient delay and mammography were obtained from hospital records from 1989 and 1994, and analysed using Cox proportional hazard analysis of death within the first 5 years, with the factors age, country, delay/mammography detection and established patho-anatomic variables. A comparison of patient delay and mammography detection in 1989 and 1994 showed more mammography-detected tumours in south Sweden and more women with long delay in east Denmark. Mammography detection, but not long patient delay, had a significant effect on the death hazard when adjusting for patho-anatomic risk factors. The hazard ratio was not eliminated in 1989, but in 1994, the hazard ratio between east Denmark and south Sweden was reduced from 1.3 to 1.1. In conclusion, patient delay did not appear to have any effect on 5-year survival when adjusting for patho-anatomic factors, but tumour detection by mammography affected survival favourably and partly explained the survival difference between east Denmark and south Sweden. (c) 2006 Elsevier Ltd. All rights reserved.

Details

Authors
  • L. H. Christensen
  • G. Engholm
  • R. Cortes
  • J. Ceberg
  • U. Tange
  • M. Andersson
  • Anna Bladström
  • H. T. Mouridsen
  • Torgil Möller
  • Hans Storm
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cancer and Oncology

Keywords

  • screening, patient delay, mammography, breast cancer survival
Original languageEnglish
Pages (from-to)2773-2780
JournalEuropean Journal of Cancer
Volume42
Issue number16
Publication statusPublished - 2006
Publication categoryResearch
Peer-reviewedYes