Table 3:

The highest performance of active learning methods

	i2b2/VA 2010				ShARe/CLEF 2013
	P	R	F1	SAR (%)	P	R	F1	SAR (%)
Sup	0.8378	0.8053	0.8212	NA	0.7865	0.5819	0.6689	NA
ID	0.8429	0.8114	0.8268	47	0.7934	0.5953	0.6803	48
LC	0.8444	0.8112	0.8275	44	0.7911	0.5965	0.6803	48

Abbreviations: NA, not available; SAR, sequences annotation rate; P, precision; R, recall; F1, F1-measure; Sup, supervised approach; ID, information density; LC, least confidence .