Table 1 Characteristics of the FDA AERS Data Set used to identify high-frequency concepts

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