Research Article

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

Figure 4

Headache duration in the two groups. Treatments resulted in a significant time-related reduction in the number of days that patients experienced headaches throughout the follow-up period. versus the sham group. change by time interaction in the treatment group.