Screening for Breast Cancer in Malmö: A Randomized Trial
The breast cancer screening program in Malmö was designed as a controlled study to investigate whether repeated invitation to screening with mammography might reduce the mortality from breast cancer. The program was started in January 1977 in the city of Malmö, which has about 235000 residents. The invited cohort consisted of a 50% random sample of all women born between 1908 and 1932 (aged 45–69 years) living in the city at the time of the initiation of the screening. The randomization was done on an individual basis. Thus, the invited group and the control group were equally large, each consisting of approximately 21 000 women. The study is planned to go on for 10 years and will thus be finished in January 1987.
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