Cambridge Multimorbidity Score: substance misuse

The codelists are available in the Appendix S1, and their curation is described in the methods section of the main manuscript.

Construction of these codelists into clinical variables underlying the Cambridge Multimorbidity Score is described in the Appendix S2, Table S3.1. This codelist was not developed for purposes other than CMS construction. It had a limited clinical review of the included terms following the upload to Opencodelists. No additional SNOMED terms, which might have been introduced to the SNOMED editions since the original codelist curation, were searched for. The codelist therefore might not be comprehensive.

The codelists might not be identical to those published, as codes not found in the SNOMED CT dictionary of OpenCodelists.org were filtered out before the upload. To do so, diagnosis codelists were checked against SNOMED CT version uksct2cl42.2.0_20260603000001Z and codes flagged as "not found" were removed. The unfound codes are presumed to be codes generated/maintained by EMIS.