Table 4

Patient-reported outcomes by treatment.

Outcome and Treatment Group	Score, Mean
Outcome and Treatment Group	Baseline	7 y	10 y	Δ at 10 y^{^a}	P Value^{^b}
Neck Disability Index
CDA	50.6	19.1	16.2	34.1	0.30
ACDF	50.6	20.8	20.4	30.0
VAS neck
CDA	72.1	18.5	12.5	59.4	0.25
ACDF	73.3	25.3	20.3	53.4
VAS arm
CDA	69.9	15.0	12.2	56.5	0.13
ACDF	64.4	19.1	16.6	47.4
SF-12 physical component score
CDA	33.9	46.6	49.5	15.7	0.004
ACDF	34.3	44.1	43.7	9.5
SF-12 mental component score
CDA	43.6	51.1	52.8	9.1	0.44
ACDF	44.1	51.0	51.5	7.2

↵a Least-square means and mean change from baseline to 10 y.
↵b Comparing mean change at 10 y in CDA vs ACDF. Significant P values bolded.
ACDF, anterior cervical discectomy and fusion; CDA, cervical disc arthroplasty; SF-12, short form-12; VAS, visual analog scale.