Efficacy of Pulsed Radiofrequency on Cervical 2-3 Posterior Medial Branches in Treating Chronic Migraine: A Randomized, Controlled, and Double-Blind Trial

Figure 3

Reduction of pain intensity in the two groups. (a) There was a significant time-related change during the follow-up of the treatment group compared to the sham group. The value of the independent-sample -test refers to the difference between groups in the pain intensity at different time points. The VAS was improved in the first month and stabilized by the sixth month. and versus the sham group, change by time interaction in the treatment group. (b) The histogram demonstrates the number of patients achieving pain reduction. There were significant differences between groups in numbers of the patients achieving more than 30% pain reduction. versus the treatment group.

(a)

(b)