Table 7

Performance by corpus size.

Corpus size

Relation

Metric

C25

C50

C77

has_finding

Count

91

216

311

P

66

63

65

R

74

74

81

F1

67

67

72

has_indication

Count

91

117

224

P

22

25

42

R

30

31

47

F1

23

25

42

has_location

Count

127

199

364

P

72

71

72

R

76

80

81

F1

73

74

75

has_target

Count

51

90

136

P

65

49

62

R

60

65

66

F1

59

54

63

laterality_modifies

Count

57

73

128

P

77

78

84

R

69

68

88

F1

72

69

84

negation_modifies

Count

34

67

101

P

78

79

79

R

80

93

93

F1

78

84

85

sub_location_modifies

Count

30

43

76

P

64

91

88

R

64

85

95

F1

64

86

91

Overall

Count

481

805

1340

P

62

63

65

R

65

71

75

F1

63

66

69

Variation in performance by training corpus size. The "Count" row gives the number of training instances of a relation type, for the given corpus. The cumulative feature set +event of Table 4 was used.

Roberts et al. BMC Bioinformatics 2008 9(Suppl 11):S3   doi:10.1186/1471-2105-9-S11-S3