: The file primarily serves as a bridge between Zip Codes and the NCHS Urban-Rural Classification Scheme . This scheme categorizes U.S. counties into six levels, ranging from "Large Central Metro" to "Noncore (Rural)". Why Researchers Use This Data
: During the COVID-19 pandemic, these crosswalks were vital for mapping infection rates against socioeconomic data tied to specific Zip Code Tabulation Areas (ZCTAs). How to Access and Use the Data nchsk19zip 2021
Accessing the 2021 version of this zip file is essential for several types of healthcare analysis: : The file primarily serves as a bridge
: Because these files can be large, they are best handled using statistical software like SAS, R, or Stata . Why Researchers Use This Data : During the
: It is usually distributed as a compressed .zip file containing either a .csv or a fixed-width text file.