Great care is taken not to include codes which have children not in the
range. E.g., 100.9 to 101.1 would not include code
101. See the extensive tests covering this area for much more detail.
expand_range(start, end, ...)# S3 method for character
expand_range(start, end, short_code = NULL,
defined = TRUE, ...)
# S3 method for icd9
expand_range(start, end, short_code = guess_short(c(start,
end)), defined = TRUE, ex_ambig_start = TRUE, ex_ambig_end = TRUE,
...)
start %i9da% end
start %i9sa% end
start %i9d% end
start %i9mj% end
start %i9s% end
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 or 00010.
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.
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 officially defined 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.
single logical value, if TRUE the range returned
will not include codes which are explicitly listed in the range, but would
imply a broader range than specified. E.g. V10 %i9sa% V1009 would
by default (FALSE) include V10 even though V10 itself
is parent to everything up to V11.
single logical, same as ex_ambig_start but affects
codes at the end of the range. E.g. ‘99.99’ to ‘101.01’ would
by default exclude 101 and 101.0
character: Expand a range of ICD-9 or ICD-10 codes when the
class is not known
icd9: Expand a range of ICD-9 codes
The default for the argument defined is TRUE since this is far
more likely to be useful to the end user, dealing with real ICD codes.
When the class is not known, it must be guessed from the start and end codes. If this guessing fails, e.g. start is ICD-9 whereas end is ICD-10, then an error is thrown. Otherwise, the appropriate S3 method is called.
# NOT RUN {
expand_range("428.0", "428.9")
"4280" %i9s% "4289"
"4280" %i9s% "42821"
"42799" %i9sa% "42802" # doesn't include 428 or 4280
"427.99" %i9da% "428.02"
"V80" %i9s% "V810"
# }
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