Ultrasound-Guided versus Fluoroscopy-Guided Deep Cervical Plexus Block for the Treatment of Cervicogenic Headache

Table 2

Comparison of the NRS before and after treatment.

	US	FL
Baseline	7.61 ± 1.12	7.50 ± 1.06
2 wks	3.45 ± 0.54	3.40 ± 0.58
12 wks	2.41 ± 0.62	2.39 ± 0.68
24 wks	2.36 ± 0.56	2.43 ± 0.59

Significantly different from the baseline at P < 0.05.
Significantly different from 2 wks after treatment at P < 0.05.