Table 1 Characteristics of patients
|  | VBD (N = 23) | SDD (N = 23) | P valuea |
|---|---|---|---|
Sex, n (%) | |||
 Male | 12 (52.2) | 9 (39.1) | 0.554 |
 Female | 11 (47.8) | 14 (60.9) |  |
Level, n (%) | |||
 C 5–6 | 17 (73.9) | 20 (87.0) | 0.457 |
 C 6–7 | 6 (26.1) | 3 (13.0) |  |
Side, n (%) | |||
 Left | 12 (52.2) | 16 (69.6) | 0.365 |
 Right | 11 (47.8) | 7 (30.4) |  |
Age, mean ± sd | 54.22 ± 10.52 | 57.48 ± 7.80 | 0.239 |
Preop Arm-VAS, mean ± sd | 6.70 ± 2.70 | 7.39 ± 1.83 | 0.306 |
Preop Neck-VAS, mean ± sd | 6.39 ± 2.59 | 7.09 ± 2.11 | 0.323 |
Preop NDI, mean ± sd | 15.30 ± 4.55 | 15.78 ± 3.64 | 0.696 |
Preop JOA, mean ± sd | 13.00 ± 0.74 | 13.43 ± 0.90 | 0.079 |
Preop Myodynamia, mean ± sd | 4.43 ± 0.59 | 4.61 ± 0.58 | 0.32 |