Table 2.

Visual analogue scale of back pain after treatment at different follow-up time

Follow-up time	RFA group (n = 36)	Endoscope group (n = 36)	p-value
Preoperation	6.28 ± 1.28	7.25 ± 1.66	0.008*
After 1 month	2.03 ± 1.65	0.58 ± 1.13	< 0.001*
After 3 months	2.33 ± 1.53	0.75 ± 1.44	< 0.001*
After 6 months	3.28 ± 1.78	0.92 ± 1.68	< 0.001*
After 12 months	4.22 ± 2.40	1.14 ± 1.82	< 0.001*
p-value	< 0.001	< 0.001

Values are presented as mean±standard deviation.

RFA, radiofrequency ablation.

^*p<0.05, statistically significant differences.