Objective A number of randomised controlled trials have been performed to determine the effectiveness or efficacy of acupuncture in primary dysmenorrhoea. The objective of this review was to explore the relationship between the ‘dose’ of the acupuncture intervention and menstrual pain outcomes.
Methods Eight databases were systematically searched for trials examining penetrating body acupuncture for primary dysmenorrhoea published in English up to September 2015. Dose components for each trial were extracted, assessed by the two authors and categorised by neurophysiological dose (number of needles, retention time and mode of stimulation), cumulative dose (total number and frequency of treatments), needle location and treatment timing.
Results Eleven trials were included. Components of acupuncture dose were well reported across all trials. The relationship between needle location and menstrual pain demonstrated conflicting results. Treatment before the menses appeared to produce greater reductions in pain than treatment starting at the onset of menses. A single needle during menses may provide greater pain reduction compared to multiple needles. Conversely, multiple needles before menses were superior to a single needle. Electroacupuncture may provide more rapid pain reduction compared to manual acupuncture but may not have a significantly different effect on overall menstrual pain.
Conclusions There appear to be relationships between treatment timing and mode of needle stimulation, and menstrual pain outcomes. Needle location, number of needles used and frequency of treatment show clear dose-response relationships with menstrual pain outcomes. Current research is insufficient to make definitive clinical recommendations regarding optimum dose parameters for treating primary dysmenorrhoea.
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Contributors MA conceptualised the review, performed the searches, extracted the data and wrote the manuscript. CAS contributed to the conceptualisation, extracted the data and commented on the manuscript.
Funding This review consists of material generated as part of MA's PhD thesis. The Australian Postgraduate Association (APA) provided funding for this thesis.
Competing interests MA has recently finished his PhD on acupuncture for primary dysmenorrhoea. CAS has published an RCT on acupuncture for primary dysmenorrhea which was not included in this review.
Provenance and peer review Not commissioned; externally peer reviewed.
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