Table 2.

Direct mapping through synonymy in the UMLS and through explicit mapping relations in the UMLS (for each type of terms in MedDRA)

Type	Syn.	%	Rel.	%	Total
SOC	14	100.0	0	0.0	14
HGLT	80	97.6	2	2.4	82
HLT	392	95.8	17	4.2	409
PT alone	9,168	96.7	316	3.3	9,484
PT / LLT	799	92.2	68	7.8	867
Total	10,453	96.3	403	3.7	10,856