Table 3.
CSAs measured at the 8-point of the CTS-hands with different NCS severities (n = 212)
| Negative (n = 32) |
Minimal (n = 40) |
Mild (n = 43) |
Moderate (n = 85) |
Severe (n = 10) |
Extreme (n = 2) |
|
|---|---|---|---|---|---|---|
| i4 | 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) |
| i3 | 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) |
| i2 | 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) |
| i1 | 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)* |
| o1 | 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)* |
| o2 | 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)* |
| o3 | 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)* |
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
Unit of CSA = mm2
*p < 0.01, by Mann-Whitney U test (comparing CSAs of the minimal to extreme groups with the negative group)