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Table 4 LAD-test diagnostic properties as established by each examiner

From: Clinical Accuracy of the Lateral-Anterior Drawer Test for Diagnosing Posterior Cruciate Ligament Rupture

 

LAD-test diagnostic accuracy (per-protocol results)

LAD-test diagnostic accuracy (as-treated results)

 

Expert clinician

Advanced clinician

Novice clinician

Expert clinician

Advanced clinician

Novice clinician

 

Test session-1

Test session-1

  

95% CI

 

95% CI

 

95% CI

 

95% CI

 

95% CI

 

95% CI

Sensitivity

57%

29%; 82%

86%

57%; 98%

64%

35%; 87%

56%

30%; 80%

75%

48%; 93%

56%

30%; 80%

Specificity

83%

70%; 93%

98%

89%; 100%

94%

83%; 99%

85%

71%; 94%

98%

88%; 100%

93%

82%; 99%

PPV

50%

25%; 75%

92%

64%; 100%

75%

43%; 95%

56%

30%; 80%

92%

64%; 100%

75%

43%; 95%

NPV

87%

74%; 95%

96%

86%; 100%

90%

78%; 97%

85%

71%; 94%

92%

80%; 98%

86%

73%; 94%

LR + 

3.43

1.57; 7.47

41.14

5.85; 289.53

10.29

3.21; 32.91

3.70

1.65; 8.29

34.5

4.86; 244.70

8.63

2.66; 27.97

LR-

0.51

0.28; 0.95

0.15

0.04; 0.53

0.38

0.19; 0.77

0.52

0.29; 0.91

0.26

0.11; 0.60

0.47

0.27; 0.82

 

Youden Index

Youden Index

 

40%

84%

58%

41%

73%

49%

 

Agreement with MRI findings

Agreement with MRI findings

 

77%

95%

87%

77%

92%

84%

 

Test Session-2

Test Session-2

Sensitivity

57%

22%; 82%

86%

57%; 98%

79%

49%; 95%

56%

30%; 80%

75%

48%; 93%

69%

41%; 89%

Specificity

90%

77%; 97%

96%

86%; 99%

92%

80%; 98%

91%

79%; 98%

96%

85%; 99%

91%

79%; 98%

PPV

62%

32%; 86%

86%

57%; 98%

73%

45%; 92%

69%

39%; 91%

86%

57%; 98%

73%

45%; 92%

NPV

88%

75%; 95%

96%

86%; 99%

94%

82%; 99%

86%

73%; 94%

92%

80%; 98%

89%

77%; 96%

LR + 

5.49

2.13; 14.12

20.57

5.21; 81.24

9.43

3.55; 25.06

6.47

2.31; 18.14

17.25

4.32; 68.89

7.91

2.93; 21.34

LR-

0.48

0.26; 0.88

0.15

0.04; 0.54

0.23

0.09; 0.64

0.48

0.27; 0.84

0.26

0.11; 0.61

0.34

0.17; 0.71

 

Youden Index

Youden Index

 

47%

82%

71%

47%

71%

60%

 

Agreement with MRI findings

Agreement with MRI findings

 

82%

94%

89%

82%

90%

85%

  1. LAD = Lateral-Anterior Drawer test; PPV = positive predictive value; NPV = negative predictive value; LR +  = positive likelihood ratio; LR- = negative likelihood ratio; MRI = Magnetic resonance imaging
  2. 95% CI = 95% Confidence Interval (lower; upper limit)