Acupuncture for Frequent Migraine: A Randomized, Patient/Assessor Blinded, Controlled Trial with One-Year Follow-Up

Figure 3

The time course of the average pain measured with a six-point Likert scale over the five treatment phases (mean and SD). Tw4, Tw8, Tw12, Tw16, and Tw20 correspond to the treatment weeks 1–4, weeks 5–8, weeks 9–12, weeks 13–16, and weeks 17–20, respectively; Pw4, 8, and 12 correspond to the posttreatment weeks 1–4, weeks 5–8, and weeks 9–12; indicated that at that point in time, the significant difference between two groups was detected.