Clinical efficacy of ultrasound-guided pulsed radiofrequency combined with ganglion impar block for treatment of perineal pain

Table 1 Comparison of visual analog scale scores at different time points before and after the treatment

Variables	Before treatment	After treatment
		24 h	1 mo	3 mo	6 mo
No. of cases	30	30	30	30	30
VAS	7.7 ± 0.82	5.4 ± 1.7a	4.2 ± 2.0a	4.3 ± 1.89a	3.1 ± 2.85a,d

^aP < 0.05, vs the visual analogue scale (VAS) score before the treatment.

^dP < 0.05 vs the VAS score at 24 h after the treatment.

VAS: Visual analogue scale.