Table 5.

Comparison of clinical outcomes in four groups.

		ACDF + UPR		ACDF		P-value
		<3 mm	≥3 mm	<3 mm	≥3 mm
Fusion rate	1-year follow up	90.00%	92.00%	92.16%	94.67%	0.35
JOA score	Pre-operative	9.88 ± 1.59	10.27 ± 1.69	10.02 ± 1.71	10.35 ± 1.56	0.31
	Post-operative	15.47 ± 1.63	15.28 ± 1.70	13.37 ± 1.75	15.58 ± 1.65	0.03
	Post-operative RR	78.26 ± 10.32%	76.42 ± 11.25%	50.49 ± 11.17%	79.37 ± 11.62%	0.01
	1-year follow-up	16.27 ± 0.83	16.02 ± 0.87	14.57 ± 0.95	16.32 ± 0.71	0.01
	1-year RR	90.26 ± 5.12%	87.63 ± 6.07%	65.57 ± 6.52%	90.87 ± 5.35%	0.01
VAS score	Pre-operative	6.26 ± 1.05	5.32 ± 0.91	6.14 ± 1.07	5.24 ± 1.13	0.16
	Post-operative	0.86 ± 0.49	0.78 ± 0.37	3.38 ± 1.23	0.62 ± 0.33	0.01
	Post-operative RR	85.72 ± 8.13%	87.16 ± 8.07%	46.5 ± 9.63%	89.25 ± 7.68%	0.01
	1-year follow-up	0.90 ± 0.31	0.76 ± 0.29	1.32 ± 0.43	0.79 ± 0.25	0.01
	1-year RR	90.32 ± 5.52%	91.69 ± 5.32%	78.50 ± 6.23%	92.55 ± 5.13%	0.01
C2-C7 Cobb angles	Pre-operative	11.21 ± 4.84	11.32 ± 4.92	11.15 ± 5.02	11.38 ± 5.15	0.36
	Post-operative	15.17 ± 5.06	15.36 ± 4.98	16.90 ± 5.23	15.76 ± 5.42	0.28
	1-year follow-up	17.56 ± 5.12	16.71 ± 5.08	17.08 ± 5.35	16.98 ± 5.19	0.31

ACDF, anterior cervical discectomy and fusion; UPR, uncinate process resection; JOA, Japanese orthopedic association; VAS, visual analog scale; RR, Recovery rate. P <0.05 is considered as significant.