Computing comorbidity indices and scores such as the weighted Charlson score (Charlson, 1987 tools:::Rd_expr_doi("10.1016/0021-9681(87)90171-8")) and the Elixhauser comorbidity score (Elixhauser, 1998 tools:::Rd_expr_doi("10.1097/00005650-199801000-00004")) using ICD-9-CM or ICD-10 codes (Quan, 2005 tools:::Rd_expr_doi("10.1097/01.mlr.0000182534.19832.83")). Australian and Swedish modifications of the Charlson Comorbidity Index are available as well (Sundararajan, 2004 tools:::Rd_expr_doi("10.1016/j.jclinepi.2004.03.012") and Ludvigsson, 2021 tools:::Rd_expr_doi("10.2147/CLEP.S282475")), together with different weighting algorithms for both the Charlson and Elixhauser comorbidity scores.
Maintainer: Alessandro Gasparini alessandro@ellessenne.xyz (ORCID)
Other contributors:
Hojjat Salmasian hsalmasian@bwh.harvard.edu (ICD-9-CM scores) [contributor]
Jonathan Williman jonathan.williman@otago.ac.nz (ORCID) [contributor]
Sing Yi Chia cxycsy@hotmail.com (ORCID) [contributor]
Edmund Teo ed_teo8@yahoo.com.sg (ORCID) [contributor]
Desi Quintans [contributor]