Table 3.

Comparison of clinical outcome according to surgical levels

Variable	1-Level ACDF (n=78)	2-Level ACDF (n=49)	3-Level ACDF (n=38)	p-value
Neck VAS
Preoperative	5.44 ± 0.91	5.35 ± 1.42	4.95 ± 1.51	0.128
Postoperative 6 mo	2.01 ± 1.10	2.43 ± 1.26	2.95 ± 1.51	< 0.001*
Postoperative 12 mo	2.19 ± 1.07	2.20 ± 1.10	2.55 ± 1.61	0.291
Postoperative 24 mo	1.79 ± 1.03	1.70 ± 1.08	2.34 ± 1.42	0.033*
Arm VAS
Preoperative	6.03 ± 0.97	6.20 ± 1.10	5.84 ± 1.90	0.421
Postoperative 6 mo	2.04 ± 1.01	2.65 ± 1.93	3.29 ± 1.30	< 0.001*
Postoperative 12 mo	2.35 ± 0.58	2.43 ± 1.02	2.24 ± 1.13	0.595
Postoperative 24 mo	2.05 ± 0.56	2.12 ± 1.15	1.94 ± 1.11	0.196
NDI
Preoperative	19.34 ± 2.52	20.43 ± 3.59	20.58 ± 4.02	0.082
Postoperative 24 mo	7.17 ± 1.87	8.37 ± 3.52	9.08 ± 3.27	0.001*

Values are presented as mean±standard deviation.

ACDF, anterior cervical discectomy and fusion; VAS, visual analogue scale; NDI, Neck Disability Index.

^*p<0.05, statistically significant differences.