Summary and comparison of driving disability score improvement from preoperative score over time.
| Timepoint | Cervical Disc Arthroplasty (N = 209) | Anterior Cervical Discectomy and Fusion (N = 188) | P a |
| 6 wk | −1.44 ± 1.44 | −0.88 ± 1.68 | <0.001 |
| 3 mo | −1.76 ± 1.25 | −1.61 ± 1.18 | 0.103 |
| 6 mo | −1.94 ± 1.23 | −1.68 ± 1.22 | 0.016 |
| 1 y | −1.98 ± 1.22 | −1.68 ± 1.16 | 0.006 |
| 2 y | −1.96 ± 1.15 | −1.75 ± 1.21 | 0.032 |
| 3 y | −1.94 ± 1.22 | −1.68 ± 1.24 | 0.007 |
| 5 y | −2.01 ± 1.17 | −1.57 ± 1.38 | <0.001 |
| 7 y | −1.92 ± 1.26 | −1.61 ± 1.31 | 0.004 |
| 10 y | −1.94 ± 1.22 | −1.63 ± 1.39 | 0.003 |
aP values were from a generalized linear model adjusted from preoperative score as the covariate.