Using GIS to Identify Priority Sites for Colorectal Cancer Screening Programs in Texas Health Centers

The service area of an FQHC includes different ZCTAs across county boundaries, and patients living in the same ZCTA may be covered by different FQHCs. Because the service areas of different FQHCs may overlap, we used the locations of the FQHC system’s administrative offices when mapping the information associated with each FQHC. Because the boundaries of the service areas of the FQHCs, ZCTAs, and counties do not necessarily line up well, analyses associated with these area units were performed separately. [...]we produced lists of counties and ZCTAs with the highest number of age-eligible people without up-to-date screening. [...]we used data from the 72 FQHC systems in Texas to calculate the number of age-eligible patients (50 to 74 y) without up-to-date screening in December of 2020.