Table 5.

Multivariate analysis for 50% improvements at 2-year postoperative for VAS neck and arm scores.^a

Variable	VAS Neck		VAS Arm
	Odds Ratio (95% CI)	P Value	Odds Ratio (95% CI)	P Value
Baseline NDI	0.958 (0.919–1.151)	.045	0.994 (0.952–1.038)	.788
Baseline SF 36 PCS	1.020 (0.981–1.060)	.323	1.046 (1.005–1.089)	.028
Baseline SF 36 MCS	1.021 (0.998–1.044)	.079	1.038 (1.014–1.063)	.002
Arm pain greater than neck pain	NS	NS	1.707 (1.073–2.716)	.024

Abbreviations: NDI, neck disability index; SF-36 MCS, Short-Form 36 Mental Component Summary; SF-36 PCS, Short-Form 36 Physical Component Summary; VAS, visual analog scale.

^aBold indicates significant values.