1. Screening Mammography in Finland - 1.5 Million Examinations with 97 percent Specificity
- Author
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Peter B. Dean and M. Pamilo
- Subjects
Gynecology ,medicine.medical_specialty ,medicine.diagnostic_test ,Referral ,Screening mammography ,business.industry ,Obstetrics ,Hematology ,General Medicine ,medicine.disease ,Predictive value ,Breast cancer ,Oncology ,Surgical biopsy ,medicine ,Mammography ,Radiology, Nuclear Medicine and imaging ,Stage (cooking) ,Detection rate ,business - Abstract
A nationwide mammography screening program including women aged 50-59 years at the time of the first invitation and involving more than 100 radiologists was started in Finland in January, 1987. From 1987 through 1997, a total of 1690496 invitations to biennial two-view mammography screening was sent out. The compliance for screening was 88.5% with 1 495744 screening examinations performed during this 11-year period. There were 49020 recalls (3.28% of those attending) for further work-up studies and 9689 women (0.65% of those attending) were referred for surgery. The total number of screening-detected breast cancers was 5595, giving a detection rate of 3.7 cancers per 1000 screening studies. More than half (57.7%) of all surgical biopsies revealed breast cancer and 67.8% of the invasive cancers were at Stage I. The positive predictive value of referral to surgical biopsy increased from 33.2% in 1987 to 65.5% in 1997, and the ratio of malignant to benign biopsies more than tripled from the first to the fift...
- Published
- 1999
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