The NACCHO list frame consisted of 2,807 records. However, we removed 49 “inappropriate” records and 37 “tribal” records so that our final sampling frame contained 2,623 organizations. Inappropriate records included duplicate records, records without title or agency name, as well as other inappropriate records such as public health consultants, foundations, special interest groups (for handgun violence, for example), students, and professors.
The sample file was first sorted by urban/rural status. The NACCHO file did not include an urban/rural status variable. This variable was created for sampling using the zip code from the file, which mapped each organization to the state and county in which it resides. We then determined whether this county was inside a Census defined Metropolitan Statistical Area (MSA). The Census Bureau defines MSAs as the counties that involve economic activity related to a central city. If the county was in an MSA, we counted this organization as “urban.” Otherwise, we classified the organization as “rural.” Finally, the list was also sorted according to Census region, state, and zip code to ensure a regionally representative sample.
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