Table 3.

Comparison of change of mean values for all chronological phases (2 phases each time) for patients between SLR positive and negative (mean ± SD).

SLR	Pre-op to 1d	Pre-op to 3 mo	Pre-op to 6 mo	Pre-op to 12 mo	Pre-op to 36 mo
VAS (lumbar)
Positive (0°–30°)	2.42 ± 2.27	2.21 ± 2.70	2.42 ± 2.63	2.68 ± 2.60	2.78 ± 2.71
Positive (31°–60°)	3.04 ± 3.12	3.22 ± 3.13	3.33 ± 3.14	3.41 ± 3.16	3.43 ± 3.13
Negative (61 °–)	3.73 ± 3.21	3.81 ± 3.25	3.85 ± 3.17	3.88 ± 3.03	3.88 ± 3.03
	0.403	0.372	0.385	0.498	0.520
VAS (leg)
Positive ( 0°–30° )	4.89 ± 1.73	5.11 ± 1.29	5.37 ± 1.46	5.32 ± 1.53	5.39 ± 1.54
Positive ( 31°–60° )	5.84 ± 2.49	6.10 ± 2.47	6.25 ± 2.46	6.51 ± 2.39	6.59 ± 2.38
Negative (61 °– )	6.69±2.60	6.77 ± 2.57	6.80 ± 2.59	6.73 ± 2.44	6.73 ± 2.44
	0.012*	0.006*	0.020*	0.010*	0.008*
ODI
Positive ( 0°–30° )	24.77 ± 13.76	30.96 ± 14.97	36.19 ± 13.55	39.02 ± 16.55	44.92 ± 18.23
Positive ( 31°–60° )	39.99 ± 21.19	47.09 ± 19.45	50.55 ± 19.66	53.28 ± 19.19	56.41 ± 20.49
Negative (61 °– )	46.13 ± 20.37	50.55 ± 21.41	54.08 ± 20.79	56.20 ± 21.91	58.83 ± 22.32
	0.002*	0.001*	0.002*	0.008*	0.026*
JOA
Positive ( 0°–30° )	8.42 ± 3.25	9.11 ± 3.11	10.21 ± 2.66	11.15 ± 2.32	11.61 ± 5.11
Positive ( 31°–60° )	11.08 ± 4.94	11.98 ± 4.71	13.04 ± 4.71	14.12 ± 4.60	15.18 ± 6.12
Negative (61 °– )	12.65 ± 4.72	12.73 ± 5.20	13.46 ± 4.93	13.92 ± 5.03	14.96 ± 6.48
	0.006*	0.012*	0.010*	0.010*	0.019*

VAS visual analog scale, ODI Oswestry Disability Index, JOA Japanese Orthopedic Association, SLR straight leg raising test.

*Statistically significant (P < 0.05).