Table 2.

The numbers of concepts in each data set

Categories	i2b2 Test		Cardiology		Neurology		Orthopedics
	Total	Average	Total	Average	Total	Average	Total	Average
Problem	18,550	39	7,474	37	4,971	25	5,022	25
Treatment	13,560	28	5,706	29	3,815	19	6,494	33
Test	12,899	27	4,603	23	2,233	11	1,253	6
All Concepts	45,009	94	17,783	89	11,019	55	12,769	64
# Sentences	45,052	94	21,255	106	15,339	77	16,855	84