The Charlson index, especially the Charlson/Deyo, followed by the Elixhauser have been most commonly referred by the comparative studies of comorbidity and multimorbidity measures.
Charlson'i indeksile, eriti Charlson'i/Deyo indeksile, millele järgneb Elixhauser, on komorbiidsust ja multimorbiidsust võrdlevates uuringutes kõige sagedamini viidatud.