apply_hier: Apply hierarchy and choose naming for each comorbidity map
In icd: Comorbidity Calculations and Tools for ICD-9 and ICD-10 Codes

Re-used by ICD-9 and ICD-10 versions which have the same rules.

apply_hier_elix(x, abbrev_names, hierarchy = TRUE)

apply_hier_quan_elix(cbd, abbrev_names, hierarchy = TRUE)

apply_hier_quan_deyo(cbd, abbrev_names, hierarchy = TRUE)

apply_hier_ahrq(cbd, abbrev_names, hierarchy = TRUE)

`x`	matrix or data.frame of comorbidities
`abbrev_names`	single logical value that defaults to `TRUE`, in which case the shorter human-readable names stored in e.g. `ahrqComorbidNamesAbbrev` are applied to the data frame column names.
`hierarchy`	single logical value that defaults to `TRUE`, in which case the hierarchy defined for the mapping is applied. E.g. in Elixhauser, you can't have uncomplicated and complicated diabetes both flagged.

For Deyo's Charlson comorbidities, strictly speaking, there is no dropping of more e.g. uncomplicated DM if complicated DM exists, however, this is probably useful, in general and is essential when calculating the Charlson score.

icd documentation built on July 2, 2020, 4:07 a.m.