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- Jonsson, Håkan, 1956-, et al.
(författare)
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Service Screening with Mammography in Sweden : Evaluation of Effects of Screening on Breast Cancer Mortality in Age Group 40–49 Years
- 2000
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Ingår i: Acta Oncologica. - : Taylor & Francis. - 0284-186X .- 1651-226X. ; 39:5, s. 617-623
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the study was to develop a model for estimating the effect of the nation-wide service screening program with mammography on breast cancer mortality in Sweden. In 1997, the introduction of population-based service screening had been completed in all 26 counties. In approximately half of the counties suitable for evaluation, the lower age limit for invitation was 40 years (study population) and in the other half the age limit was 50 years (control population). The numbers of females aged 40-49 years for the two populations were 202 152 and 237 279, respectively (1988). The study and control populations were compared for the period 1986-1996 with regard to refined breast cancer mortality. To adjust for geographical differences, the period 1976-1986 was used as reference. With a mean follow-up time of 8 years, the estimated relative risk of breast cancer death in relation to invitation to service screening among women aged 40-49 years at breast cancer diagnosis was 0.91 (95% confidence interval 0.72-1.15). These findings were compatible with those presented in the previous overview of the Swedish randomized studies.
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| 2. |
- Jonsson, Håkan, 1956-, et al.
(författare)
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Service screening with mammography of women aged 70-74 years in Sweden : effects on breast cancer mortality
- 2003
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Ingår i: Cancer Detection and Prevention. - 0361-090X .- 1873-443X. ; 27:3, s. 360-369
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Tidskriftsartikel (refereegranskat)abstract
- Since the benefit of mammography screening for women 70 years and older is unclear, the aim of the present study was to evaluate the effect on breast cancer mortality of the population-based service-screening program in Sweden inviting women 70-74 years. Among the counties with service-screening programs in Sweden which started 1986-1990 those with upper age limit 74 years were compared to counties with 69 years as upper age limit with respect to refined breast cancer mortality. Allowance was made for potential biases namely inclusion of cases diagnosed before invitation and lead time. Two methods for estimation of breast cancer mortality were used; underlying cause of death (UCD) and excess mortality. With a mean follow-up of 10.1 years a reduction of the breast cancer excess mortality was estimated at 24%. Using the underlying cause of death the corresponding result was 6%. A non-significant reduction in breast cancer mortality was found in the counties with service-screening program including the age group 70-74 years in Sweden. The estimated reduction was larger when using excess mortality compared to the use of individual underlying cause of death.
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