CCSRfind - Convert ICD-10 Codes to CCSR Codes
Provides a tool for matching ICD-10 codes to corresponding
Clinical Classification Software Refined (CCSR) codes. The main
function, CCSRfind(), identifies each CCSR code that applies to
an individual given their diagnosis codes. It also provides a
summary of CCSR codes that are matched to a dataset. The
package contains 3 datasets: 'DXCCSR' (mapping of ICD-10 codes
to CCSR codes), 'Legend' (conversion of DXCCSR to
CCSRfind-usable format for CCSR codes with less than or equal
to 1000 ICD-10 diagnosis codes), and 'LegendExtend' (conversion
of DXCCSR to CCSRfind-usable format for CCSR codes with more
than 1000 ICD-10 dx codes). The disc() function applies grepl()
('base') to multiple columns and is used in CCSRfind().
