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Incidence of breast cancer in Norway and Sweden during introduction of nationwide screening: prospective cohort study
- Source :
- BMJ. 328:921-924
- Publication Year :
- 2004
- Publisher :
- BMJ, 2004.
-
Abstract
- Objective To determine whether any increase in the incidence of breast cancer in women detected by mammography is compensated for by a drop in the incidence after age 69, years when women are no longer invited for screening. Design Population based cohort study of incidence of breast cancer during the introduction of nationwide screening programmes. Setting Norway and Sweden. Participants All women aged above 30 years (1.4 and 2.9 million, respectively, in 2000). Main outcome measures Changes in age specific incidence rates of invasive breast cancer associated with the introduction of the screening programmes. Results As a result of screenin creening is defined as the detection of low malignancy lesions that otherwise would not be detected in a patient9s lifetime. It is often argued that overdiagnosis is not a problem for screening in breast cancer.1 – 3 For example, Boer et al predicted a 31% increase in incidence of breast cancer in the Dutch mass screening programme that would be nearly fully compensated for by a strong drop in the incidence after age 69 years conclusion Without screening one third of all invasive breast cancers in the age group 50-69 years would not have been detected in the patients9 lifetime. This level of overdiagnosis is larger than previously reported
- Subjects :
- Adult
medicine.medical_specialty
Pediatrics
Breast Neoplasms
Malignancy
Cohort Studies
Age Distribution
Breast cancer
medicine
Humans
Mass Screening
Mammography
Prospective Studies
Overdiagnosis
Prospective cohort study
Mass screening
Aged
General Environmental Science
Sweden
Gynecology
medicine.diagnostic_test
Norway
business.industry
Incidence
Incidence (epidemiology)
General Engineering
General Medicine
Middle Aged
medicine.disease
Papers
General Earth and Planetary Sciences
Female
business
Cohort study
Subjects
Details
- ISSN :
- 14685833 and 09598138
- Volume :
- 328
- Database :
- OpenAIRE
- Journal :
- BMJ
- Accession number :
- edsair.doi.dedup.....1e958dc3e4ebe5870523c825f03cee89