icd9 (version 1.1)

icd9InReferenceCode: match ICD9 codes

Description

Finds children of icd9Reference and looks for icd9 in the resulting vector.

Usage

icd9InReferenceCode(icd9, icd9Reference, isShort, isShortReference = TRUE)
icd9 %i9in% icd9Reference

Arguments

isShort

single logical value which determines whether the ICD-9 code provided is in short (TRUE) or decimal (FALSE) form. Where reasonable, this is guessed from the input data.

isShortReference

logical, see argument isShort

"icd9,icd9Reference"

is a character vector or factor of ICD-9 codes. If fewer than five characters is given in a code, then the digits are greedily assigned to hundreds, then tens, then units, before the decimal parts. E.g. "10" becomes "010", not "0010".

Value

logical vector of which icd9 match or are subcategory of icd9Reference

Examples

# NOT RUN {
#%i9in% assumes both test code(s) and reference set of codes are \emph{short}
"1024" %i9in% "102"
"1024" %i9in% c("102","1025")
c("102", "1024","1025") %i9in% "102"
c("102", "1024","1025") %i9in% c("1024", "1025")
c("102", "1024","1025") %i9in% c("102", "1024", "1025")
# }