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Table 8 Logistic regression results for Model 2 prediction of extensor spasticity from pendulum test metrics: RI, F1amp, and Plat

From: Predictive value of the pendulum test for assessing knee extensor spasticity

LR terms for Model 2 (Ext2)

Observed Ext2

Predicted Ext2

Predictive value

Low spasticity

High spasticity

aRI

Low spasticity

52

5

NPV = .91

High spasticity

26

3

PPV = .10

Overall

Spec = .66

Sens = .38

CA = 64.0%

bF1amp

Low spasticity

49

8

NPV = .86

High spasticity

20

9

PPV = .31

Overall

Spec = .71

Sens = .53

CA = 67.4%

cPlat

Low spasticity

54

3

NPV = .95

High spasticity

22

7

PPV = .24

Overall

Spec = .71

Sens = .70

CA = 70.9%

dF1amp, Plat

Low spasticity

50

7

NPV = .88

High spasticity

20

9

PPV = .31

Overall

Spec = .71

Sens = .56

CA = 68.6%

  1. aRI: Constant = 1.006; Beta(RI) = − 1.623, p = .026
  2. bF1amp: Constant = .834; Beta(F1amp) = −.029, p = .005
  3. cPlat: Constant = 1.044; Beta(Plat) = −.035, p = .022
  4. dF1amp, Plat: Constant = .897; Beta(F1amp) = −.028, p = .072; Beta(Plat) = −.003, p = .907