Table 1.

Criteria to categorize Systematized Nomenclature of Medicine–Clinical Terminology use in the review.

Criteria	Definition
Clinical use context	Refers to clinical domain or specialty as documented in the study.
EHRa system	Refers to EHR systems or other EHR-related applications or software as documented in the study.
Users	Refers to intended users of the SNOMED CTb integrated into the EHR as documented in the study.
SNOMED CT use category	Refers to primary purpose for using SNOMED CT as documented in the study [3,5,13]. Based on research team agreement, the following categories were used: standard for EHR or for a clinical application, retrieval or analysis of patient data, data extraction (used to classify or code in a study), proving merit of SNOMED CT, and development of automated coding.
SNOMED CT use phase	Refers to the stage of the SNOMED CT use as documented in the study [3,5]. The stages used by the research team were “in development,” “in pilot,” “in implementation,” “in use,” and “after implementation [or in use] evaluation” (ie, proof of merit). Thus, for example, theoretical research was excluded.
SNOMED CT core benefits	Refers to research team’s summary of which areas of identified benefits the research added value to, if available [3,5]. The categories were “improving quality of care and patient safety”; “improving continuity of care”; “enabling a consistent way of indexing, storing, retrieving, and aggregating clinical data”; “improving data quality”; and “improving coding productivity.”

^aEHR: electronic health record.

^bSNOMED CT: Systematized Nomenclature of Medicine–Clinical Terminology.