As with parseAhrqSas, this function reads SAS code, and
in, a very limited way, extracts definitions. In this case the code uses
LET statements, with strings or lists of strings. This saves and invisibly
returns a list with names corresponding to the comorbidities and values as
a vector of 'short' form (i.e. non-decimal) ICD9 codes. Unlike
icd9_parse_ahrq_sas, there are no ranges defined, so this
interpretation is simpler.
icd9_parse_quan_deyo_sas(save_data = FALSE, offline = TRUE)logical whether to save the result in the source tree.
Defaults to FALSE.
single logical, if TRUE then don't pull the file from
internet, only return path and file name if the file already exists in the
raw data directory. This is helpful for testing without using the internet.
Deprecated. The map is not condensed by default. If required,
it can reduced to a smaller set of codes using icd_condense.
invisibly returns the list of vectors, where a co-morbidity name is associated with a character vector of ICD-9 codes.
With thanks to Dr. Quan, I have permission to distribute his SAS code. Previously, the SAS code would be downloaded from the University of Manitoba at http://mchp-appserv.cpe.umanitoba.ca/concept/ICD9_E_Charlson.sas.txt. There are structural differences between this version and the version directly from Dr. Quan, however, the parsing results in identical data.