Table 2.

Comparing Clinical Outcomes and Reoperation Rates.^a

				Bivariateb		Multivariateb
	Central/Paracentral	Far Lateral	All Patients	β	P	β	P
Preoperative
VAS back	7.13 ± 3.21	7.72 ± 2.43	7.23 ± 3.07	0.59	.628	0.63	.660
VAS leg	6.64 ± 3.40	7.59 ± 1.71	6.81 ± 3.18	0.96	.175	1.65	.243
ODI	51.82 ± 18.81	47.57 ± 15.89	51.11 ± 18.29	−4.26	.529	−8.19	.274
SF-12 mental	55.08 ± 5.83	45.73 ± 16.04	52.74 ± 10.01	−9.34	.196	−13.35	.018
SF-12 physical	36.51 ± 10.39	24.75 ± 8.01	33.15 ± 11.04	−11.76	.008	−8.60	0.137
VR-12 mental	57.02 ± 6.56	47.01 ± 13.58	53.81 ± 10.29	−10.01	.020	−17.56	.009
VR-12 physical	38.92 ± 11.82	25.86 ± 9.30	34.37 ± 12.53	−13.06	.013	−9.42	.366
Postoperative
VAS back	2.85 ± 2.65	3.87 ± 3.33	2.99 ± 2.74	1.02	.334	1.93	.094
VAS leg	1.96 ± 2.56	2.29 ± 3.33	2.01 ± 2.65	0.33	.747	0.80	.509
ODI	21.33 ± 18.93	38.20 ± 20.05	23.96 ± 19.93	16.87	.013	20.50	.006
SF-12 mental	55.20 ± 8.38	54.11 ± 12.70	54.91 ± 9.46	−1.09	.800	2.76	.647
SF-12 physical	40.53 ± 13.34	34.14 ± 16.82	38.81 ± 14.30	−6.39	.322	−0.15	.985
VR-12 mental	57.72 ± 10.92	54.91 ± 12.14	56.83 ± 11.11	−2.81	.594	0.59	.932
VR-12 physical	44.20 ± 13.93	35.69 ± 16.44	41.49 ± 14.94	−8.51	.222	−0.05	.977
Reoperation	12.94%	20.00%	14.00%	1.68	.468	7.93	.048

Abbreviations: ODI, Oswestry Disability Index; SF-12, 12-Item Short Form Mental and Physical Survey; VAS, Visual Analog Scale; VR-12, Veterans RAND 12-Item Mental and Physical Survey.

^aValues in boldface indicate statistical significance (P ≤ .02).

^bCentral/Paracentral used as reference group.