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Table 3 CSAs measured at the 8-point of the CTS-hands with different NCS severities (n = 212)

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

 

Negative

(n = 32)

Minimal

(n = 40)

Mild

(n = 43)

Moderate

(n = 85)

Severe

(n = 10)

Extreme

(n = 2)

i 4

14.3 ± 4.6 (7-28)

15.4 ± 4.7 (8-30)

17.3 ± 5.3 (8-34)*

19.8 ± 6.8 (8.9-41)*

17.3 ± 8.9 (8-40.8)

15.5 ± 3.5 (13-18)

i 3

14.0 ± 4.3 (8-28)

15.0 ± 4.6 (8-27)

16.0 ± 4.6 (8-26)

18.4 ± 5.9 (8.9-42)*

17.3 ± 8.9 (8-40.8)

15.5 ± 3.5 (16-22)

i 2

11.9 ± 2.1 (8-17)

12.0 ± 3.0 (7-21)

12.3 ± 2.4 (6-18)

13.8 ± 3.8 (7-29)

13.4 ± 4.7 (8-23.6)

17.0 ± 1.4 (16-18)

i 1

12.2 ± 2.7 (7-20)

12.6 ± 3.1 (7-20)

14.8 ± 4.9 (8-28)

15.4 ± 5.0 (7-34.4)*

16.7 ± 6.7(11.1-34.3)*

14.5 ± 7.8 (9-20)

w

12.2 ± 2.9 (7-22)

12.9 ± 3.4 (7-22)

14.6 ± 3.4 (7-23) *

17.5 ± 5.8 (9-40.4)*

16.0 ± 5.7 (8.9-26)

26.5 ± 9.2 (20-33)*

o 1

11.0 ± 2.3 (7-16)

12.2 ± 2.8 (8-20.7)

12.9 ± 3.0 (8-20) *

14.3 ± 3.2(8.7-27.4)*

13.9 ± 4.5 (7-20.3)

22.5 ± 4.9 (19-26)*

o 2

10.6 ± 2.0 (6-15)

11.6 ± 2.6 (8-21)

12.0 ± 2.2 (8-17) *

12.8 ± 2.7 (7-21.3)*

13.9 ± 3.6 (9-19.9)

17.0 ± 0.0 (17-17)*

o 3

10.6 ± 2.7 (5-17)

10.9 ± 2.0 (7-15)

11.2 ± 1.9 (7-15)

11.5 ± 2.5 (6-19)

12.0 ± 2.2 (9-16)

19.0 ± 0.0 (19-19)*

  1. Abbreviations: CSAs, cross-section areas; CTS-hands, carpal tunnel syndrome hands; NCS, nerve conduction study Markers of the 8-point: i4, i3, i2, i1, w, o1, o2, and o3
  2. Unit of CSA = mm2
  3. *p < 0.01, by Mann-Whitney U test (comparing CSAs of the minimal to extreme groups with the negative group)
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BMC Medical Imaging

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