Table 8.

Patient-reported outcome measures among surgical groups.

Patient reported outcome measure	Timepoint	Total CDA (n=150)	Total ACDF (n=150)	p-value
Mean VAS-neck	Preoperative	7.2	7.3	.731
	6 weeks postop	6.5	6.4	.213
	3 months postop	5.6	5.5	.178
	6 months postop	4.8	4.9	.193
	1-year postop	4.3	4.5	.172
	2-year postop	3.8	3.9	.180
	Mean Improvement	3.3	3.6	.293
Mean VAS-arm	Preoperative	7.0	7.2	.836
	6 weeks postop	6.3	6.2	.335
	3 months postop	5.2	5.4	.287
	6 months postop	4.5	47	.361
	1-year postop	4.0	4.3	.344
	2-year postop	3.7	3.8	.389
	Mean Improvement	3.7	3.9	.433
Median NDI	Preoperative	39	40	.412
	6 weeks postop	34	38	.002
	3 months postop	28	30	.032
	6 months postop	24	25	.031
	1-year postop	20	22	.044
	2-year postop	12	14	.026
	Mean Improvement	27	26	.038

ACDF, anterior cervical discectomy and fusion; CDA, cervical disc arthroplasty; NDI, Neck Disability Index; VAS, Visual Analog Scale. Values represent the mean (standard deviation). Bolded values indicate significance at a 95% confidence level. Bolded values indicate significance at a 95% confidence level.