Related Experiment Videos
An ecological study of the effectiveness of mammography in reducing breast cancer mortality
G S Cooper1, Z Yuan, S J Bowlin
1University Hospitals of Cleveland, MetroHealth Medical Center, Case Western Reserve University School of Medicine, OH 44106-5000, USA.
Objectives:
The purpose of this study was to determine the relation of screening mammography to breast cancer incidence and case fatality.
Methods:
In a sample of White female Medicare beneficiaries hospitalized in 1990-1991, age-adjusted breast cancer incidence and 2-year case fatality rates were estimated and compared with the frequency of mammographic screening from a population-based survey.
Results:
The average rates for incidence, case fatality, and mammography within 5 years in 29 states were 414/100,000, 18.8%, and 59.2%, respectively. There was a positive state-level correlation between mammography rates and incidence and an inverse correlation between mammography and case fatality.
Conclusions:
High screening mammography rates in some states are associated with reduced breast cancer case fatality rates, presumably as a result of diagnosis of earlier stage cancers.