Van Walraven C, Austin PC, Jennings A, Quan H and Forster AJ. Identifying increased risk of readmission and in-hospital mortality using hospital administrative data: the AHRQ Elixhauser comorbidity index.
Moore BJ, White S, Washington R, Coenen N, and Elixhauser A. A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. Coding algorithms for defining comorbidities in ICD-9-CM and ICD-10 administrative data. Quan H, Sundararajan V, Halfon P, Fong A, Burnand B, Luthi JC, et al. As a convenience, a message is printed to the R console when non-alphanumeric characters are found. ICD-10 and ICD-9 codes must be in upper case and with alphanumeric characters only in order to be properly recognised set des = TRUE to properly tidy the codes automatically. See vignette("comorbidityscores", package = "comorbidity") for further details on the comorbidity scores and the weighting algorithm. Finally, the categorisation of scores and weighted scores is based on work by Menendez et al. in 1987, while weights for the Elixhauser score are based on work by Moore et al. Weights for the Charlson score are based on the original formulation by Charlson et al. The ICD-10 and ICD-9-CM coding for the Charlson and Elixhauser scores is based on work by Quan et al. via the utils::View() function) for convenience.
Labels are presented to the user when using the RStudio viewer (e.g. Windex_vw, for the weighted version of the grouped Elixhauser index using the algorithm in van Walraven et al. Windex_ahrq, for the weighted version of the grouped Elixhauser index using the AHRQ algorithm (Moore et al., 2017) Wscore_vw, for the weighted version of the Elixhauser score using the algorithm in van Walraven et al. Wscore_ahrq, for the weighted version of the Elixhauser score using the AHRQ algorithm (Moore et al., 2017) Index, for the non-weighted version of the grouped Elixhauser index Score, for the non-weighted version of the Elixhauser score Rheumd, for rheumatoid arthritis/collaged vascular disease įed, for fluid and electrolyte disorders Solidtum, for solid tumour, without metastasis Pud, for peptic ulcer disease, excluding bleeding Pcd, for pulmonary circulation disorders Windex, for the weighted version of the grouped Charlson index.Ĭonversely, for the Elixhauser score the dataset contains the following variables: Wscore, for the weighted version of the Charlson score
Index, for the non-weighted version of the grouped Charlson index Score, for the non-weighted version of the Charlson score Msld, for moderate or severe liver disease ValueĪ data frame with id, columns relative to each comorbidity domain, comorbidity score, weighted comorbidity score, and categorisations of such scores, with one row per individual.įor the Charlson score, the following variables are included in the dataset:Ĭopd, chronic obstructive pulmonary disease ĭiab, for diabetes without complications Tidy diagnostic codes? If TRUE, all codes are converted to upper case and all non-alphanumeric characters are removed using the regular expression ].
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