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Table 4 Diagnostic accuracy of clinician examination conclusion

From: Accuracy of physical examination for chronic lumbar radiculopathy

Predictor

L4 nerve root impingement

L5 nerve root impingement

S1 nerve root impingement

 

Sens

Spec

+LR

−LR

Sens

Spec

+LR

−LR

Sens

Spec

+LR

−LR

Clinician concluded L4 nerve root impingement

0.33 (0.06–0.79)

0.95 (0.89–0.97)

6.28 (1.06–37.21)

0.70 (0.32–1.57)

0.10 (0.03–0.26)

0.95 (0.89–0.98)

2.15 (0.51–9.06)

0.94 (0.83–1.07)

*

*

*

*

Clinician concluded L5 nerve root impingement

0.33 (0.06–0.79)

0.68 (0.59–0.76)

1.05 (0.21–5.30)

0.98 (0.43–2.20)

0.47 (0.30–0.64)

0.73 (0.63–0.81)

1.74 (1.04–2.93)

0.73 (0.51–1.04)

0.26 (0.13–0.45)

0.66 (0.56–0.75)

0.77 (0.38–1.55)

1.12 (0.85–1.46)

Clinician concluded S1 nerve root impingement

0.33 (0.06–0.79)

0.38 (0.30–0.47)

0.54 (0.11–2.68)

1.75 (0.76–4.03)

0.43 (0.27–0.61)

0.32 (0.23–0.43)

0.64 (0.42–0.99)

1.74 (1.12–2.69)

0.74 (0.55–0.87)

0.43 (0.33–0.53)

1.29 (0.97–1.72)

0.61 (0.31–1.20)

  1. Values in each cell are an estimate and 95% confidence intervals.
  2. Sens indicates sensitivity (TP/TP+FN).
  3. Spec indicates specificity (TN/TN+FP).
  4. +LR indicates positive likelihood ratio (Sens/1-Spec).
  5. −LR indicates negative likelihood ratio (1-Sens/Spec).
  6. *No TP (True Positive).