# title
This Evidence resource describes the placebo comparator used in a study evaluating acupuncture for the prevention of episodic migraine.

# description
Klaus Linde et al. Cochrane Database of Systematic Reviews, 06 / 2016

# assertion
Placebo comparator for acupuncture in the prevention of episodic migraine

# statistic[].description
Efficacy calculated based on participants who achieved at least a 50% reduction in headache frequency in the sham acupuncture comparator group.