Usage
icd9Condense(icd9, isShort = icd9GuessIsShort(icd9), onlyReal = NULL, warn = TRUE)
icd9CondenseDecimal(icd9Decimal, onlyReal = NULL, warn = TRUE)
icd9CondenseShort(icd9Short, onlyReal = NULL, warn = TRUE, keepFactorLevels = FALSE)
Arguments
icd9
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".
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.
onlyReal
single logical value, if TRUE, will limit the search to those
codes which appear in the master list, not just syntactically valid codes.
Since nearly valid, out-dated or new codes may be missed, not limiting to
'real' values will be useful. Ultimately, there will need to be annual (and
all-time) master lists of codes and the ability to test against a given
master list given the year of the ICD-9 coding.
warn
single logical value, if TRUE, give warnings when
there is discrepancy between onlyReal being TRUE yet data
containing undefined codes.
icd9Decimal
character vector 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"
icd9Short
is a character vector 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"
keepFactorLevels
single logical value, default FALSE. If
TRUE, will reuse the factor levels from the input data for the
output data. This only applies if a factor is given for the input codes.