Coding algorithms for defining Charlson and Elixhauser co-morbidities in Read-coded databases.
David MetcalfeJames MastersAntonella DelmestriAndrew JudgeDaniel PerryCheryl ZoggBelinda GabbeMatthew CostaPublished in: BMC medical research methodology (2019)
The comorbidity code lists may be used by future researchers to calculate CCI and EM using records from Read coded databases. The EM is preferable to the CCI but only marginal gains should be expected from incorporating comorbidities over a period longer than 1 year.