Table 6

Performance without customized dictionary on gold standard corpus.

PHI Type

PHI sub-type

Count

# FNs

Per Category Recall

Per Category Precision

Name

Patient Name

54

1

0.981

Patient Name Initial

2

2

0.00

Relative/Proxy Name

175

5

0.971

Clinician Name

593

24

0.973

0.731

Date

Date (not year)

482

26

0.946

Year

46

11

0.761

0.712

Location

367

231

0.371

0.840

Phone

53

0

1.00

0.898

Age over 89

4

1

0.750

0.600

Undefined

3

2

0.333

N/A

Overall

1779

295

0.834

0.725

(FNs are false negatives and N/A indicates not applicable.)

Neamatullah et al. BMC Medical Informatics and Decision Making 2008 8:32   doi:10.1186/1472-6947-8-32