Abstract
The C3 and M3 indices were developed as part of the Cancer and Chronic Conditions (C3) research group's projects: 1) Cancer and Comorbidities; 2) Multimorbidity. The indices are intended to allow adjustment for comorbidity when considering survival outcomes for patients with cancer (C3) and for use in more general settings not specific to cancer (M3). They have been validated and published in peer-reviewed journals.
Code available for download via Dropbox:
• SAS macro for scoring the C3 and M3 indices. The file is a SAS macro that can score C3 or M3 for a given dataset. The macro can also code for the Charlson and Elixhauser indices.
• R function scripts for scoring the C3 and M3 indices – this code does not currently allow for scoring of Charlson or Elixhauser indices.
Notes on setting up data for the macro/function (separate README files for SAS and R), and format of output (Word document); and an example file illustrating potential data layouts for the macro/function (Excel file) are also provided.