Table 3.

Remaining PHI analysis by tool, I2B2 corpus.

PHI category	Instances of PHI remaining (PHIlter)	Instances of PHI remaining (Physionet)	Instances of PHI remaining (Scrubber)
Age	0	1	0
Device	0	6	0
Medical record	0	524	18
Patient	2	154	92
Date	0	4590	1587
Fax	0	2	0
Phone	0	31	67
Zip	0	3	1
Username	1	92	92
Street	2	27	21
Location-other	2	9	12
Idnum	2	297	206
City	2	14	52
Doctor	5	197	186

PHI counts for PHIlter, Physionet and Scrubber performance on the I2B2 corpus.