The function icd_history
takes the result of icd_expand
,
specified for a particular year, and returns a data.frame
containing all corresponding codes for the specified years
(from 2003). To do this, it applies the ICD-10-GM transition
tables to map codes between successive ICD-10-GM versions.
Only automatic transitions are followed.
icd_history(icd_expand, years, custom_transitions = NULL)
icd_expand | A data.frame (e.g. as generated by the function icd_expand) |
---|---|
years | Years to historize (e.g. 2005:2014) |
custom_transitions | (Optional) A data.frame containing custom transitions to complement the official transitions provided by |
data.frame with columns YEAR, ICD_CODE, ICD_COMPRESSED, ICD_LABEL and, if specified, DIAG_GROUP