Table 1.

Changes in JOA scores and improvement according to JOA scores at the indicated times during treatment

Duration of follow‐up	n	JOA score [mean ± s.d.]	Treatment effect (n)				Excellent and good rate (%)
			Excellent	Good	Fair	Poor
Before treatment	83	11.65 ± 4.25	—	—	—	—	—
3 months	83	22.13 ± 2.79	18	48	13	4	79.52
6 months	83	23.66 ± 2.83	32	36	14	1	81.93
1 year	83	24.11 ± 2.96	36	32	15	0	81.93
2 years	83	24.22 ± 3.06	35	34	14	0	83.13