Table 3.

Overall performance of the PICO entity recognition models on the test set

Model	Weight	F1	Recall	Precision
BiLSTM	–	43.5	38.1	50.6
BiLSTM-CRF	–	57.9	54.7	61.6
BERT	Base	61.3	66.3	57.1
	BioBERT	65.4	69.8	61.5
	PubMed-abs	70.1	73.2	67.3
	PubMed-full	69.9	73.4	66.7
BERT-CRF	Base	62.1	67.2	57.8
	BioBERT	66.5	70.1	63.3
	PubMed-abs	68.0	71.5	64.9
	PubMed-full	67.5	70.9	64.5
BERT  - BiLSTM  - CRF	Base	64.6	69.5	60.3
	BioBERT	68.3	71.2	65.6
	PubMed-abs	67.2	70.8	64.0
	PubMed-full	68.5	72.6	64.8