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Table 3 Performance of multivariate models for predicting histologically confirmed inflammation

From: Clinical features as predictors of histologically confirmed inflammation in patients with lumbar disc herniation with associated radiculopathy

  

Histology negative for inflammation

Histology positive for inflammation

       

Model

N

Predicted negative for inflammation

Predicted positive for inflammation

Predicted negative for inflammation

Predicted positive for inflammation

Sensitivity

Specificity

% correctly predicted

LR+

LR-

Diagnostic Odds Ratio

R-square (Cox & Snell)

Model 1

37

24

2

1

10

90.9%

92.3%

91.9%

11.8

0.1

120.0

0.42

Model 2

40

24

5

3

8

72.7%

82.8%

80.0%

4.2

0.3

12.8

0.36

Model 3

39

26

2

1

10

90.9%

92.9%

92.3%

12.7

0.1

130.0

0.42

  1. N Number of samples, % Percentage, LR+ Positive likelihood ratio, LR- Negative likelihood ratio, R-square Coefficient of determination – the proportion of variance in the presence or absence of inflammation in the disc that is explained by the predictive model