Annals of Oncology Advance Access originally published online on October 10, 2005
Annals of Oncology 2005 16(12):1882-1888; doi:10.1093/annonc/mdi404
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© 2005 European Society for Medical Oncology
Variation in survival after diagnosis of breast cancer in Switzerland
1 Krebsregister des Kantons Zürich (formerly Krebsregister St Gallen-Appenzell), Zurich; 2 Centre de Coordination ASRT (Association Suisse des Registres des Tumeurs); 3 Registre Genevois des Tumeurs, Geneva; 4 Registro Ticinese dei Tumori, Locarno; 5 Kantonales Krebsregister Graubünden, Choir; 6 Krebsregister beider Basel; 7 Zentrale Informatikdienststelle Basel Stadt, Basel; 8 Registre Valaisan des Tumeurs, Sion, Switzerland
* Correspondence to: Dr J.-M. Lutz, Centre de Coordination de l'ASRT, c/o Registre Genevois des Tumeurs, 55 Boulevard de la Cluse, 1205 Geneva, Switzerland. Tel: +41-22-379-4950; Fax: +41-22-379-4971; E-mail: jean-michel.lutz{at}imsp.unige.ch
Background: Survival after diagnosis of cancer is a key criterion for cancer control. Major survival differences between time periods and countries have been reported by the EUROCARE studies. We investigated whether similar differences by period and region existed in Switzerland.
Methods: Survival of 11 376 cases of primary invasive female breast cancer diagnosed between 1988 and 1997 and registered in seven Swiss cancer registries covering a population of 3.5 million was analysed.
Results: Comparing the two periods 19881992 and 19931997, age-standardized 5 year relative survival improved globally from 77% to 81%. Furthermore, multivariate analysis adjusting for age, tumour size and nodal involvement identified regional survival differences. Survival was lowest in the rural parts of German-speaking eastern Switzerland and highest in urbanised regions of the Latin- and German-speaking northwestern parts of the country.
Conclusions: This study confirms that survival differences are present even in a small and affluent, but culturally diverse, country like Switzerland, raising the issue of heterogeneity in access to care and quality of treatment.
Key words: breast cancer, cancer registry, population-based, survival differences, Switzerland
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