Table 2.

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.