Table 2.
Potential factors related to percutaneous short-term SCS electrode shift.
| Variables | All patients (N = 25) | Less shift group (N = 13) | More shift group (N = 12) | p value |
|---|---|---|---|---|
| T1, mm, mean (SD) | 22.51 ± 9.51 | 23.75 ± 10.00 | 21.17 ± 9.18 | 0.510 |
| T2, mm, mean (SD) | 29.53 ± 10.12 | 26.17 ± 10.26 | 33.18 ± 8.98 | 0.083 |
| Length of shift (T2-T1), mm, median (IQR) | 4.38 (2.00–11.19) | 2.06 (1.81–3.27) | 11.19 (6.50–18.87) | < 0.001 |
| Actual length of the cervical spine (L1), mm, median (IQR) | 120.85 (115.98–130.03) | 125.97 (118.30–131.72) | 117.88 (113.33–124.32) | 0.098 |
| Straight length of the cervical spine (L2), mm, median (IQR) | 118.82 (113.15–128.03) | 122.72 (117.17–128.72) | 115.97 (111.63–122.59) | 0.110 |
| Difference in L1 and L2 (L1-L2), mm, mean (SD) | 2.23 ± 1.41 | 2.23 ± 1.37 | 2.23 ± 1.52 | 0.996 |
| Ratio of L1 to L2 (L1/L2), mean (SD) | 1.02 ± 0.01 | 1.02 ± 0.01 | 1.02 ± 0.01 | 0.779 |
| spinal canal diameter, mm, mean (SD) | 24.20 ± 3.26 | 24.84 ± 1.88 | 23.51 ± 4.28 | 0.319 |
| spinal canal transverse diameter, mm, median (IQR) | 18.36 (16.40–19.57) | 18.04 (15.84–19.18) | 19.09 (18.14–20.56) | 0.205 |
| C2 vertebral body height, mm, mean (SD) | 33.31 ± 3.36 | 33.47 ± 2.75 | 33.15 ± 4.04 | 0.815 |
DoC, Disorders of consciousness. SCS, spinal cord stimulation.p < 0.05, statically different.