Table 4.

Patient VAS-LP scores by timepoint.

Foraminal Stenosis Type	VAS-LP
	Preoperative	Postoperative 1 mo	Postoperative 6 mo	Postoperative 12 mo	Postoperative 24 mo	P
Stable type I	7.35 ± 2.16	1.65 ± 0.64	1.35 ± 0.44	1.12 ± 0.40	1.00 ± 0.38	<0.001
Stable type II	7.70 ± 2.02	2.40 ± 0.68	2.05 ± 0.55	1.35 ± 0.48	1.33 ± 0.42	<0.001
Stable type III	6.52 ± 1.92	3.53 ± 1.02	2.00 ± 0.76	1.11 ± 0.36	0.50 ± 0.28	<0.001
Stable type IV	7.65 ± 1.98	2.05 ± 0.82	1.05 ± 0.64	1.02 ± 0.60	1.00 ± 0.52	<0.001
Unstable type I	7.50 ± 1.78	2.16 ± 0.66	1.40 ± 0.76	0.99 ± 0.58	0.87 ± 0.56	<0.001
Unstable type II	8.05 ± 1.80	2.42 ± 0.54	2.10 ± 0.82	1.35 ± 0.74	1.09 ± 0.44	<0.001
Unstable type III	6.45 ± 1.64	1.02 ± 0.48	1.33 ± 0.54	0.70 ± 0.32	0.67 ± 0.26	<0.001
Unstable type IV	7.10 ± 2.36	2.22 ± 0.72	2.02 ± 0.68	0.75 ± 0.52	0.73 ± 0.38	<0.001

Abbreviation: VAS-LP, visual analog scale leg pain.

Note: Data provided as mean ± SD. P value shows statistical significance between preoperative VAS-LP and VAS-LP 24 mo after surgery.