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Table 6 Performance indices for the clinical prediction rule

From: A diagnostic support tool for lumbar spinal stenosis: a self-administered, self-reported history questionnaire

  Estimate
Index Derivation Data Set (n = 234) Validation Data Set (n = 250)
Sensitivity 0.855 0.843
Specificity 0.791 0.781
Likelihood Ratio   
Positive Test Result 1.951 1.886
Negative Test Result 0.201 0.214
Area under the ROC curve 0.797 0.782
  1. Positive criteria: Total score ≥ 4 (Q1–Q4) or Total score ≥ 1 (Q1–Q4) and ≥ 2 (Q5–Q10)