3 While interpreting 30 indicators and modeling numerous interactions can be difficult, 4 Elixhauser et al 2 recommended against a single score. 1 Two popular methods are the Elixhauser comorbidity system, 2 a set of 30 comorbidity indicators, and the Charlson co-morbidity index-a composite score summarized by a weighted combination of 17 comorbidities. # Please make sure to check the example in the documentation of the # `comorbidity()` function first, with ?comorbidity().Observational studies using administrative data require proper comorbidity adjustment to reduce bias. 'Solid tumour' ( solidtum) and 'Metastatic cancer' ( metacanc) for the Elixhauser score. 'Diabetes, uncomplicated' ( diabunc) and 'Diabetes, complicated' ( diabc) for the Elixhauser score 'Hypertension, uncomplicated' ( hypunc) and 'Hypertension, complicated' ( hypc) for the Elixhauser score 'Cancer' ( canc) and 'Metastatic solid tumour' ( metacanc) for the Charlson score 'Diabetes' ( diab) and 'Diabetes with complications' ( diabwc) for the Charlson score

'Mild liver disease' ( mld) and 'Moderate/severe liver disease' ( msld) for the Charlson score If assign0 = TRUE, the comorbidities that are affected by this argument are: assign0Ī logical value denoting whether to apply a hierarchy of comorbidities: should a comorbidity be present in a patient with different degrees of severity, then the milder form will be assigned a value of 0 when calculating the score.īy doing this, a type of comorbidity is not counted more than once in each patient. (2021).ĭefaults to NULL, in which case an unweighted score will be used. Swiss, for the Swiss Elixhauser weights by Sharma et al. Vw, for the weights by van Walraven et al. Possible values for the Elixhauser score are: Quan, for the revised weights by Quan et al. Possible values for the Charlson index are:Ĭharlson, for the original weights by Charlson et al. weightsĪ string denoting the weighting system to be used, which will depend on the mapping algorithm. An object of class comorbidty returned by a call to the comorbidity() function.

Spss code elixhauser comorbid score