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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