Aug 1, 2016 - Studies show an NNT of 3 to have at least a 50% reduction of headache frequency compared with routine care. Want to know more?
American Family Physician : Medicine by the Numbers
Jul 1, 2017 - There is moderate-quality evidence that whole-body acupuncture is effective for migraine prevention. Compared with usual care, acupuncture is more effective at reducing headache frequency by at least 50% (number needed to treat [NNT] = 4).
American Family Physician : Cochrane for Clinicians