icd9ComorbidDfToMat

data frame, with a <code>visitId</code> column (not necessarily first),
and other columns with flags for comorbidities, as such column names are
required.

The name of the column in the data frame which contains the
patient or visit identifier. Typically this is the visit identifier, since
patients come leave and enter hospital with different ICD-9 codes. It is a
character vector of length one. Defaults to "visitId"

visitId

whether the resulting data frame should have strings,
i.e. visitId converted to factor. Default is to follow the current session
option.

stringsAsFactors

convert matrix of comorbidities into data frame, preserving visitId
 information

Calculate comorbidities, Charlson scores, perform fast and accurate
validation, conversion, manipulation, filtering and comparison of ICD-9-CM
(clinical modification) codes. ICD-9 codes appear numeric but leading and
trailing zeroes, and both decimal and non-decimal "short" format codes
exist. The package enables a work flow from raw lists of ICD-9 codes from
hospital billing databases to comorbidities. ICD-9 to comorbidity mappings
from Quan (Deyo and Elixhauser versions), Elixhauser and AHRQ included.

icd9ComorbidDfToMat: convert matrix of comorbidities into data frame, preserving visitId information

Description

Usage

Arguments