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Table 3 Comparison of US and NCS: statistical values

From: Effectiveness of ultrasonography and nerve conduction studies in the diagnosing of carpal tunnel syndrome: clinical trial on accuracy

Statistical parameter US NCS
Sensitivity(%) 84.6 (76.2–90.9) 92.3 (85.4–96.6)
Specificity(%) 81.8 (48.2–97.7) 90.9 (58.7–99.8)
Positive predictive value(%) 97.8 (92.2–99.7) 99.0 (94.4–100.0)
Negative predictive value(%) 36.0 (18.0–57.5) 55.6 (30.8–78.5)
Positive likelihood ratio(%) 4.7 (1.3–16.4) 10.2 (1.6–65.9)
Negative likelihoodratio(%) 0.2 (0.1–1.3) 0.1 (0–0.2)
  1. NCS nerve conduction studies, US ultrasonography