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Table 2 Categorical Information extracted from reports who were NLP HCM positive

From: Natural language processing for identification of hypertrophic cardiomyopathy patients from cardiac magnetic resonance reports

Categorical concepts

Training set

N of reports = 86

Test set

N of reports = 83

Present

N

Absent/Negated

N

Present

N

Absent/negated

N

HCM morphologic subtype

62

24

62

21

Systolic anterior motion of the mitral valve

55

31

61

22

Mitral regurgitation

57

29

60

23

Presence of LV obstruction

56

30

58

25

Location of obstruction (LVOT, mid-ventricular)

56

30

58

25

Apical pouch

0

86

9

74

LV delayed enhancement

64

22

58

25

Left atrial enlargement

41

45

55

28

Right atrial enlargement

14

72

18

65

  1. HCM = hypertrophic cardiomyopathy, LV = left ventricular, LVOT = left ventricular outflow tract, N = number