. 2019 Sep 10;10:975. doi: 10.3389/fphar.2019.00975

Table 4.

Synthesis of mappings and properties found using all previously described methods.

Source/Method	MedDRA version	Comparator	Number of mappings	Number of properties
Using UMLS Metathesaurus mappings	v17	20,599 PT	11,281 PT (54.8%)	74,598
Using other mapping resources	v13	18,786 PT	455^a PT (2.4%)	469^a
Using a decomposition algorithm and Metamap software to map complex MedDRA terms	v13	2,070 HLT, HLGT, and SOC	638^a,b HLT, HLGT, and SOC (30.8%)	–
Automatic enrichment methods	v17	–	–	7,691^a
Manual definition of concepts	v17	20,599 PT	1,935 PT (9.1%)	13,675

^aRepresent only the number of mapping/properties that was not found by other methods.

^bLimited to SOC, HLGT, and HLT.