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Table 6 Probability of Tibial maltorsion at each measurement threshold for each of the radiographic variables studied

From: Radiographic cortical thickness parameters as predictors of rotational alignment in proximal tibial shaft fractures: a cadaveric study

Probability

Threshold

PPV

FDR

Sensitivity

Specificity

Medial Cortical Thickness

(p < 0.001)

    

 0.5

1.06

0.63

0.37

0.46

0.82

 0.6

1.52

0.60

0.40

0.33

0.89

 0.7

2.02

0.68

0.32

0.24

0.94

 0.8

2.63

0.77

0.23

0.15

0.97

 0.9

3.55

1.00

0.00

0.04

1.00

Lateral Cortical Thickness

(p < 0.001)

    

 0.5

2.42

0.55

0.45

0.49

0.77

 0.6

3.30

0.55

0.45

0.35

0.86

 0.7

4.25

0.63

0.37

0.24

0.94

 0.8

5.42

0.91

0.09

0.13

0.99

 0.9

7.17

1.00

0.00

0.04

1.00

Diameter A.P.

(p < 0.001)

    

 0.5

3.72

0.47

0.53

0.61

0.76

 0.6

4.47

0.60

0.40

0.51

0.87

 0.7

5.28

0.65

0.35

0.40

0.93

 0.8

6.27

0.94

0.06

0.26

0.99

 0.9

7.76

1.00

0.00

0.06

1.00

Anterior Cortical Thickness

(p < 0.001)

    

 0.5

1.92

0.49

0.51

0.63

0.76

 0.6

2.39

0.66

0.34

0.49

0.89

 0.7

2.90

0.86

0.14

0.36

0.94

 0.8

3.52

0.75

0.25

0.24

0.96

 0.9

4.45

0.91

0.09

0.14

0.99

Posterior Cortical Thickness

(p < 0.001)

    

 0.5

1.30

0.59

0.41

0.51

0.75

 0.6

1.78

0.60

0.40

0.34

0.85

 0.7

2.30

0.75

0.25

0.19

0.94

 0.8

2.94

0.48

0.52

0.06

0.97

 0.9

3.90

0.95

0.05

0.04

1.00

Diameter Lateral

(p < 0.001)

    

 0.5

3.91

0.42

0.58

0.62

0.77

 0.6

4.77

0.52

0.48

0.52

0.88

 0.7

5.71

0.75

0.25

0.43

0.95

 0.8

6.85

0.93

0.07

0.30

0.99

 0.9

8.57

1.00

0.00

0.13

1.00