charlson {multimorbidity}

Charlson Comorbidities

Description

charlson returns a summary dataset containing the Charlson comorbidities for each patient.

Usage

charlson(
  dat = NULL,
  id = NULL,
  dx = "dx",
  version = 19,
  version_var = NULL,
  outpatient_two = "no"
)

Arguments

dat

dataset which has been properly prepared using 'prepare_data()'

id

variable of the unique patient identifier

dx

the column with the diagnoses (defaults to 'dx')

version

which version(s) of ICD your data contain (ICD-9 only: 9, ICD-10 only: 10, Both: 19)

version_var

variable which denotes if the diagnoses on that row are ICD-9 (9) or ICD-10 (10)

outpatient_two

whether or not it should be required for there to be two outpatient claims for a diagnosis for a patient to be positively coded with that diagnosis.

Details

This function uses data which has been properly prepared to identify and flag the Charlson comorbidities. See full package documentation for additional details.

Value

dataframe with one row per patient, and a column for their patient id, a column with each Charlson comorbidity, and a column with their Charlson score

Examples

charlson(dat = prepared_data, id = patient_id, dx = dx, version = 19,
version_var = version, outpatient_two = "yes")