Electronic Frailty Index

by Alex F. Bokov, PhD

UT Health Population Health Sciences and Institute for the Integration of Medicine and Science

Analysis of Electronic Frailty Index pilot data.

Variable naming conventions

• v123_something_xx: Directly generated by DataFinisher. The v123 prefix is the order of the parent data element in the query (e.g. 123). This order is alphabetically assigned due to upstream limitations, and will likely change with each data refresh. The _something_xx portion of the should usually be stable but isn't necessarily unique. The _xx suffix indicates how this variable is represented (e.g. _tf is TRUE/FALSE, _cd is a list of distinct codes, _mn is a numeric value or median of values if several were present in the raw data for that code and encounter).
• vi_something: Generated during post-processing and is an indicator variable that aggregates a collection of raw indicator variables (i.e. is true if any of its components are true during an encounter) or by filtering a raw multi-values variable (e.g. picking out a specific department from a provider specialty column)
• v_something is a renamed variable, because the original's name was too long or too obscure.
• z_something is a derived variable for internal use, for processing other variables and not intended for direct analysis
• a_something is an analytic variable created by these scripts from the v and sometimes z variables.