Preoperative and operative characteristics of CDA and ACDF patients at 3 centers.
| Characteristic | CDA (n = 105) | ACDF (n = 50) | P Valuea |
| Age, y, mean ± SD (range) | 44.2 ± 8.0 (28–66) | 43.9 ± 8.2 (27–66) | 0.79 |
| Gender, n (%) | |||
| Men | 52 (49.5%) | 25 (50.0%) | 0.96 |
| Women | 53 (50.5%) | 25 (50.0%) | |
| BMI, mean ± SD | 27.5 ± 4.5 | 27.2 ± 3.8 | 0.66 |
| Obese (BMI >30) | 30 (28.6%) | 14 (28.0%) | 0.94 |
| Caucasian | 100 (95.2%) | 48 (96.0%) | 0.83 |
| Preoperative scores, mean ± SD | |||
| Neck Disability Index | 50.7 ± 13.9 | 50.9 ± 14.4 | 0.92 |
| Neck pain (VAS) | 72.1 ± 20.8 | 73.1 ± 19.8 | 0.77 |
| Left arm pain (VAS) | 47.9 ± 35.1 | 45.4 ± 37.3 | 0.69 |
| Right arm pain (VAS) | 41.4 ± 36.3 | 36.6 ± 35.5 | 0.44 |
| Procedure, n (%) | |||
| 1 Level | 49 (46.7%) | 22 (44.0%) | 0.86 |
| 2 Level | 56 (53.3%) | 28 (56.0%) | |
| Treated segment(s), n (%) | |||
| 1 Level | |||
| C3-C4 | 0 (0.0%) | 1 (4.5%) | 0.27 |
| C4-C5 | 1 (2.0%) | 1 (4.5%) | |
| C5-C6 | 27 (55.1%) | 9 (40.9%) | |
| C6-C7 | 21 (42.9%) | 11 (50.0%) | |
| 2 Level | |||
| C3-C5 | 0 (0.0%) | 1 (3.6%) | 0.18 |
| C4-C6 | 17 (30.4%) | 5 (17.9%) | |
| C5-C7 | 39 (69.6%) | 22 (78.6%) |
↵a Comparisons via t test for continuous variables. Fisher’s exact test for categorical variables.
ACDF, anterior cervical discectomy and fusion; BMI, body mass index; CDA, cervical disc arthroplasty; VAS, visual analog scale.