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Egyptian Journal of Radiology and Nuclear Medicine

Table 3 Correlation between the relevant operative data and ultrasonographic data

From: The correlation between pre-operative ultrasonographic median nerve evaluation and the operative procedure in CTS

Correlation variables

Flattening ratio

PS-PQ CSA

r

P

r

P

Need for neurolysis

0.69

< 0.0001

0.21

0.16

Need for approach extension

0.42

0.0205

0.68

0.0001

  1. Spearman Correlation P probability, r correlation coefficient
  2. r = 0–0.2, very low and probably meaningless; r = 0.2–0.4, a low correlation
  3. r = 0.4–0.6, a reasonable correlation; r = 0.6–0.8, a high correlation
  4. r = 0.8–1.0, a very high correlation; P < 0.05 = significant
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