Table 9. Performance of different feature combinations using automatically predicted medical concepts.

	Explicit recognizer			Implicit recognizer			Micro	INC
No	P	R	F	P	R	F	F
Baseline	0.8123	0.7043	0.7545	0.8217	0.6282	0.7120	0.7443	/
DF1	0.8105	0.7452	0.7765	0.8233	0.6427	0.7219	0.7636	0.0193
DF1+DF2	0.8116	0.7582	0.7840	0.8304	0.6491	0.7286	0.7710	0.0267
DF1+DF2+CF	0.8256	0.7599	0.7914	0.8362	0.6578	0.7363	0.7784	0.0341
DF1+DF2+CF+WF1	0.8495	0.7781	0.8122	0.8452	0.6687	0.7467	0.7967	0.0524
DF1+DF2+CF+WF1+WF2	0.8487	0.7826	0.8143	0.8501	0.6742	0.7200	0.7992	0.0549
DF1+DF2+CF+WF1+WF2+WF3	0.8494	0.7854	0.8160	0.8517	0.6749	0.7531	0.8012	0.0569
DF1+DF2+CF+WF1+WF2+WF3+HF	0.8509	0.7796	0.8137	0.8695	0.6893	0.7690	0.8031	0.0588

*Inc is increment compared with baseline.