Table 5. Performance comparison of entity recognition results under different systems.
| Category | BIO | BIEO | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BiLSTM + CRF | IDCNN + CRF | BiLSTM + CRF | IDCNN + CRF | ||||||||||||
| P (%) | R (%) | F1 | P (%) | R (%) | F1 | P (%) | R (%) | F1 | P (%) | R (%) | F1 | ||||
| All | 92.03 | 91.94 | 0.9201 | 91.62 | 91.52 | 0.9183 | 90.76 | 91.40 | 0.9108 | 90.92 | 91.75 | 0.9178 | |||
| Disease | 86.52 | 85.87 | 0.8671 | 86.76 | 85.95 | 0.8701 | 83.76 | 84.09 | 0.8491 | 83.92 | 85.12 | 0.8508 | |||
| Symptoms | 94.06 | 93.83 | 0.9425 | 94.26 | 93.97 | 0.9375 | 93.36 | 93.33 | 0.9335 | 93.86 | 92.53 | 0.9401 | |||
| Location | 96.06 | 96.88 | 0.9577 | 96.26 | 96.68 | 0.9527 | 94.26 | 94.68 | 0.9447 | 95.16 | 95.08 | 0.9497 | |||
| Exam | 88.78 | 90.04 | 0.8975 | 89.21 | 89.84 | 0.8885 | 88.27 | 89.04 | 0.8865 | 88.36 | 89.46 | 0.8950 | |||
| Exam results | 85.25 | 84.95 | 0.8397 | 84.19 | 84.07 | 0.8382 | 82.29 | 82.51 | 0.8240 | 83.01 | 82.94 | 0.8259 | |||
BIO, Begin-Intermediate-Other sequence annotation; BIEO, Begin-Intermediate-End-Other sequence annotation; BiLSTM, bidirectional long- and short-term memory; CRF, conditional random field; IDCNN, iterated dilated convolutional neural network.