This involves application of the Index of Medical Underservice (IMU) to data on a service area to obtain a score for the area. The IMU scale is from 0 to 100, where 0 represents completely underserved and 100 represents best served or least underserved. Under the established criteria, each service area found to have an IMU of 62 or less qualifies for designation of an MUA.
The IMU involves four variables - primary medical care physician-to-population
ratio, infant mortality rate, percentage of the population
with incomes below the poverty level, and percentage of the
population over age 65. The value of each of these variables
for the service area is converted to a partial score, according
to established criteria; these four scores are summed to obtain
the IMU score for the area.
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This map is courtesy of the Wayne State University Center
for Urban Studies/ Michigan Metropolitan Information Center
Official Census Bureau State Data Center Coordinating Agency.