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Excess Mortality from Breast Cancer in Relation to Mammograpy Screening in Northern Sweden
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Oncology.
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Oncology.
1997 (English)In: Journal of Medical Screening, ISSN 0969-1413, E-ISSN 1475-5793, Vol. 4, no 1, 6-9 p.Article in journal (Refereed) Published
Abstract [en]

Objectives—Previous randomised studies of mammography screening have shown a significant effect on breast cancer mortality, particularly in women aged 50–Q69 at randomisation. Breast cancer mortality has traditionally been studied by judgments on causes of death, either from cause of death registers or from medical records. In this study an alternative method was used, estimating the excess mortality associated with breast cancer.

Setting—In 1990 two counties of northern Sweden started population based mammography screening of women aged 40–74. The unscreened population in the two other counties of the same region were selected as controls.

Results—Excess mortality associated with breast cancer was lower in the screened population, and was discernible three to four years after the start of screening. The relative risk estimate, based on the cumulative excess number of deaths from breast cancer during 1990–95 in the screened versus the control population aged 40–74 (at diagnosis of breast cancer), was 0.72 (95% confidence interval (CI) 0.53 to 0.99). For women aged 50–69 it was 0.67 (95% CI 0.46 to 0.99). In the 50–69 age group the estimated excess number of deaths from breast cancer during 1995 was 17.0 per 100 000 women (95% CI 5.0 to 29.0) in the screened counties and 51.1 per 100 000 (95% CI 30.2 to 71.9) in the unscreened counties.

Conclusions—Population based routine screening has substantial effects on breast cancer mortality in women aged 50–69. Estimation of excess mortality can be used in future studies to evaluate the effects of mammography screening on breast cancer mortality.

Place, publisher, year, edition, pages
Sage Publications, 1997. Vol. 4, no 1, 6-9 p.
Keyword [en]
breast cancer, mortality, mammography screening, geographic variation
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:umu:diva-96256DOI: 10.1177/096914139700400104OAI: oai:DiVA.org:umu-96256DiVA: diva2:763347
Projects
digitalisering@umu
Available from: 2014-11-14 Created: 2014-11-14 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Evaluation of service screening with mammography in Sweden with special regard to its impact on breast cancer mortality
Open this publication in new window or tab >>Evaluation of service screening with mammography in Sweden with special regard to its impact on breast cancer mortality
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Umeå Universitet, 2002. 90 p.
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 792
Keyword
Massundersökningar (medicin), Bröstcancer, Sweden-- epidemiology
National Category
Cancer and Oncology
Identifiers
urn:nbn:se:umu:diva-94113 (URN)91-7305-250-7 (ISBN)
Public defence
2002-05-17, Tandläkarhögskolan, sal D, 9 tr., Umeå universitet, Umeå, 09:00
Opponent
Projects
digitalisering@umu
Note

Diss. (sammanfattning) Umeå : Umeå universitet, 2002, härtill 6 uppsatser

Available from: 2014-11-14 Created: 2014-10-03 Last updated: 2015-04-09Bibliographically approved

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