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Table 2 Comparison of CSAs measured at the 8-point of the A-hands and NCS negative CTS-hands

From: Ultrasonographic median nerve cross-section areas measured by 8-point "inching test" for idiopathic carpal tunnel syndrome: a correlation of nerve conduction study severity and duration of clinical symptoms

 

CSAs

pvalue

Cut-off values of CSA

Sensitivity

Specificity

 

A-hands (n = 50)

NCS negative CTS-hands(n = 32)

    

i 4

11.8 ± 2.4 (11, 8-19)

14.3 ± 4.6 (13, 7-28)

0.003*

12.5

0.688

0.720

i 3

11.5 ± 2.3 (11, 8-19)

14.0 ± 4.3 (13, 8-28)

0.001*

12.5

0.688

0.760

i 2

10.9 ± 1.9 (11, 8-16)

11.9 ± 2.1 (12, 8-17)

0.033*

11.5

0.563

0.660

I 1

10.7 ± 1.7 (10.5, 8-15)

12.2 ± 2.7 (11.1, 7-20)

0.006*

11.1

0.500

0.680

w

10.7 ± 2.0 (10.5, 7-17)

12.2 ± 2.9 (12, 7-22)

0.002*

11.5

0.594

0.760

o 1

10.1 ± 2.2 (10, 6-16)

11.0 ± 2.3 (10, 7-16)

0.082

10.5

0.469

0.600

o2

10.2 ± 2.1 (10, 7-17)

10.6 ± 2.0 (10.5, 6-15)

0.164

10.5

0.500

0.600

o 3

9.4 ± 1.9 (9, 6-15)

10.6 ± 2.7 (11, 5-17)

0.031*

10.1

0.563

0.740

  1. Abbreviations: CSAs, cross-section areas; A-hands, asymptomatic hands; CTS-hands, carpal tunnel syndrome hands; NCS, nerve conduction study
  2. Markers of the 8-point: i4, i3, i2, i1, w, o1, o2, and o3 Unit of CSA = mm2
  3. *p < 0.05, by Mann-Whitney U test
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BMC Medical Imaging

ISSN: 1471-2342

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