The purpose of this package is to provide injury researchers with easy methods for categorization of injuries described using ICD-10 diagnosis codes and for deriving measures of injury severity.

ICDPIC (International Classification of Diseases Programs for Injury Categorization) was originally developed for ICD Version 9 Clinical Modification (ICD-9-CM) diagnosis codes using Stata, providing an easy way to convert these codes to standard injury severity scores and categories. After the introduction of ICD-10-CM to US hospitals in 2015, an update to accommodate this change was developed using R, and was eventually published on CRAN as package “icdpicr”.

Package “icdpicr2” is a successor to “icdpicr”. The “Implementation Details” vignette provided with this package describes the history of injury severity scoring, ICDPIC, and “icdpicr”; it discusses issues with the original version of “icdpicr” and the aims for “icdpicr2”.

Package “icdpicr2” consists primarily of the function “cat_trauma2”. This function first reads in user data in a specified format, then calculates AIS, ISS, NISS, mortality predictions, and injury mechanisms. It returns the original data file with these fields added. Further details about the options available in “cat_trauma2” are provided in the help file for this function.

Other functions in the package derive an “iciss” (International Classification of Diseases-related Injury Severity Score) and a “framework” (categorization by injury type and location developed by the US CDC). Further information is provided in the Implementation Details and the help files for each function.