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Table 1 Comparison between MN dimensions in normal individuals and CTS patients

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

MN variable Normal (n = 60 wrists) CTS (n = 30) P
(1)Area PQ    0.305
 Range (8–10) (8–11)
 Mean ± SD 9.28 ± 0.58 9.46 ± 1.11
(1)Area PS    < 0.001
 Range (9, 10) (10–20)
 Mean ± SD 9.86 ± 0.34 14.26 ± 2.91
(1)Flattening ratio    < 0.001
 Range (2.2-2.8) (2.2-4.3)
 Mean ± SD 2.46 ± 0.16 3.68 ± 0.71
(2)Area PS- Area PQ    < 0.001
 Range (0-1) (1–10)
 Mean ± SD 0.58 ± 0.49 4.76 ± 2.34
  1. CSA cross-sectional area, PQ pronator quadratus muscle, PS pisiform bone
  2. (1)Independent sample t test for parametric quantitative data
  3. (2)Mann-Whitney test for non-parametric quantitative data
  4. Significant difference at p value < 0.05