B18zip -

: Researchers use this field to identify the geographic location of survey participants during the initial "Baseline" phase of a study cohort. Context within HOS Data

It is not a consumer file compression software like WinZip or 7-Zip. Instead, it refers to the associated with specific research "Cohorts." Technical Definition B18zip

: It is a character field (usually 22 characters in length) found in research files like the Baseline Research Identifiable File (RIF) or Limited Data Set (LDS) . : Researchers use this field to identify the

: Refers to a specific group of survey participants, specifically those part of the 2015 HOS Baseline. B18zip