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. 2015 Nov 5;2015:737–746.

Table 7.

False negative errors by CRF-rev (i2b2) and CRF-rev (Sp) models

Error types Cardiology Neurology Orthopedics

i2b2 Sp i2b2 Sp i2b2 Sp

All unseen 22 (5%) 27 (6%) 31 (6%) 32 (6%) 53 (8%) 23 (4%)
At least one unseen word 138 (31%) 100 (21%) 186 (37%) 109 (21%) 355 (51%) 112 (19%)
At least one word rarely seen 70 (16%) 81 (17%) 70 (14%) 85 (17%) 94 (14%) 113 (19%)
All seen 213 (48%) 279 (56%) 211 (43%) 288 (56%) 184 (27%) 337 (58%)