Table 1.

Characteristics of the FDA AERS Data Set used to identify high-frequency concepts

	Therapeutic Indications Data	Adverse Events Data
A. Number of records in data set (each record contains 1 Preferred Term)	850 K	1.19 M
B. Unique Preferred Terms in data set	5,540	10,304
C. Number of unique Preferred Terms already mapped to SNOMED CT in UMLS	3864 (69.7%)	6,409 (62.2%)
D. Number of unique Preferred Terms accounting for >95% of records ("high-frequency" Preferred Terms)	834 (15.1%), accounting for 60+ records each	2,871 (27.9%), accounting for 32+ records each
E. Number of high frequency Preferred Terms already mapped to SNOMED CT in UMLS	693 (83.1%)	2,226 (77.5%)
F. Number needing manual mapping (D-E)	141	645