R Program - Claims-Based Frailty Index

This R program calculates CFI for each patient from analytic data files containing information on patient identifiers, ICD-9-CM diagnosis codes (version 32), ICD-10-CM Diagnosis Codes (version 2020), CPT codes, and HCPCS codes. NOTE: When downloading, store \"CFI_ICD9CM_V32.tab\" and \"CFI_ICD10CM_V2020.tab\" as csv files (these files are originally stored as csv files, but Dataverse automatically converts them to tab files). Please read \"Frailty-Index-R-code-Guide\" before proceeding. Interpretation, validation data, and annotated references are provided in \"Research Background - Claims-Based Frailty Index\".