Geographic Disparities in Mammography Capacity in the South: A Longitudinal Assessment of Supply and Demand
Article first published online: 5 JUL 2013
© Health Research and Educational Trust
Health Services Research
Volume 49, Issue 1, pages 171–185, February 2014
How to Cite
Eberth, J. M., Eschbach, K., Morris, J. S., Nguyen, H. T., Hossain, M. M. and Elting, L. S. (2014), Geographic Disparities in Mammography Capacity in the South: A Longitudinal Assessment of Supply and Demand. Health Services Research, 49: 171–185. doi: 10.1111/1475-6773.12081
- Issue published online: 17 JAN 2014
- Article first published online: 5 JUL 2013
- National Cancer Institute. Grant Number: R25T CA57730
- National Institutes of Health. Grant Number: CA016672
- Health services accessibility;
- geographic information systems;
- health services needs and demands;
- spatial analysis
Studies have shown that there is sufficient availability of mammography; however, little is known about geographic variation in capacity. The purpose of this study was to determine the locations and extent of over/undersupply of mammography in 14 southern states from 2002 to 2008.
Mammography facility data were collected from the U.S. Food and Drug Administration (FDA). Population estimates, used to estimate the potential demand for mammography, were obtained from GeoLytics Inc.
Using the two-step floating catchment area method, we calculated spatial accessibility at the block group level and categorized the resulting index to represent the extent of under/oversupply relative to the potential demand.
Results show decreasing availability of mammography over time. The extent of over/undersupply varied significantly across the South. Reductions in capacity occurred primarily in areas with an oversupply of machines, resulting in a 68 percent decrease in the percent of women living in excess capacity areas from 2002 to 2008. The percent of women living in poor capacity areas rose by 10 percent from 2002 to 2008.
Our study found decreasing mammography availability and capacity over time, with substantial variation across states. This information can assist providers and policy makers in their business planning and resource allocation decisions.