The original mapping of Elixhauser's ICD-9-CM to 30 comorbidities. According to Sharabiani et al, this mapping provides the best long-term mortality prediction. The weaknesses of this mapping are that it is based on slightly out-dated ICD-9 codes. I have not yet verified what changes to the ICD-9-CM specification between 1998 and now would impact this mapping.
list of character vectors, each named by co-morbidity
Sharabiani, Mansour T. A., Paul Aylin, and Alex Bottle. "Systematic Review of Comorbidity Indices for Administrative Data." Medical Care December 2012 50, no. 12 (2012): 1109-18. doi:10.1097/MLR.0b013e31825f64d0. http://www.ncbi.nlm.nih.gov/pubmed/22929993
Elixhauser, Anne, Claudia Steiner, D. Robert Harris, and Rosanna M. Coffey. "Comorbidity Measures for Use with Administrative Data." Medical Care January 1998 36, no. 1 (1998): 8-27.
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