Table 2.

Classification of health domains based on the Systematized Nomenclature of Medicine–Clinical Terms (SNOMED-CT).

Parent and concept IDs			Children		Study
Medical specialty (qualifier value); SCTIDa: 394733009
	Cardiology (qualifier value); SCTID: 394579002	N/Ab		Kass-Hout et al [19]
	Medical oncology (qualifier value); SCTID: 394593009	N/A		Lacey et al [24] Kalendralis et al [37]
	Radiation oncology (qualifier value); SCTID: 419815003	N/A		Traverso et al [34]
	Emergency medicine (qualifier value); SCTID: 773568002	N/A		Bhatia et al [27]
	Public health and preventive medicine (qualifier value); SCTID: 26081000087101	N/A		Mons [35] Zondergeld et al [36]
	Infectious diseases (specialty; qualifier value); SCTID: 394807007	Tuberculosis (disorder); SCTID: 56717001 Disease caused by SARS-CoV-2 (disorder); SCTID: 840539006		Gabrielian et al [26] (tuberculosis) Mons [35] (SARS-CoV-2) Blomberg and Lauer [47] (SARS-CoV-2)
	Clinical pharmacology (qualifier value); SCTID: 394600006	N/A		Celebi et al [33]
	Child and adolescent psychiatry (qualifier value); SCTID: 394588006	N/A		Kassam-Adams et al [21]
Disease (disorder); SCTID: 64572001
	Degenerative disorder (disorder); SCTID: 362975008	Multiple sclerosis (disorder); SCTID: 2470000		Peeters [43]
	Neurocognitive disorder (disorder); SCTID: 70907300	N/A		Zondergeld et al [36]
	Genetic disease (disorder); SCTID: 782964007	Facioscapulohumeral muscular dystrophy (disorder); SCTID: 399091004		Guien et al [40]
Information systems
	Information system software (physical object); SCTID: 70659400	Cardiology information system application software (physical object); SCTID: 467522006 Emergency care information system application software (physical object); SCTID: 468401001 Radiology information system application software (physical object); SCTID: 464066007 Hospital administration information system application software (physical object); SCTID: 462944003		Kass-Hout et al [19] (cardiology) Bhatia et al [27] (emergency care) Kalendralis et al [37] (radiology) Haux and Knaup [31] (hospital administration)
Administrative procedure (procedure); SCTID: 14734007			N/A		Haux and Knaup [31] Looten and Simon [39]
Infection surveillance (regime or therapy); SCTID: 170502008			N/A		van Panhuis et al [15] Mons [35]

^aSCTID: SNOMED-CT identifier.

^bN/A: not applicable.