The number of days with migraine were significantly reduced in all three groups. This is not surprising, because doing anything, even just enrolling patients in a study, usually results in improvement; that’s why we have to use control groups. Initially there was no difference between the three groups. The effect continued in the SMT and placebo groups during follow-up, while it returned to baseline in the usual-care control group. They looked at several secondary outcomes and found some small differences, but they didn’t draw any conclusions from that data. They concluded that the effects in both the SMT and the placebo manipulation groups were “probably a placebo response.”
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