Table 6.

Performance on the assertion and relation classification tasks

System by	Medical experts	Method	External?	F measure
Assertion classification
deBruijn et al25	N	Semi-supervised	N	0.936
Clark et al41	N	Hybrid	Y	0.934
Demner-Fushman et al35	N	Supervised	Y	0.933
Jiang et al16	N	Hybrid	Y	0.931
Grouin et al36	N	Supervised	Y	0.931
Divita et al37	N	Supervised	Y	0.930
Cohen et al38	N	Supervised	N	0.928
Roberts et al23	N	Supervised	N	0.928
Anick et al39	Y	Supervised	Y	0.923
Chang et al40	N	Hybrid	Y	0.921
Relation classification
Roberts et al23	N	Supervised	N	0.737
deBruijn et al25	N	Semi-supervised	N	0.731
Grouin et al36	N	Hybrid	Y	0.709
Patrick et al19	N	Supervised	Y	0.702
Jonnalagadda and Gonzalez21	N	Supervised	N	0.697
Divita et al37	Y	Supervised	Y	0.695
Solt et al42	N	Supervised	Y	0.671
Demner-Fushman et al35	N	Supervised	N	0.666
Anick et al39	Y	Supervised	Y	0.663
Cohen et al38	N	Supervised	N	0.656