Forty-five women were randomised to EA for 12 weeks or HT for 24 months. The frequency of, and distress caused by, hot flushes were recorded daily before, during and up to 24 months after the start of treatment. In the EA group, the median number of hot flushes per 24 hours decreased significantly from 9.6 at baseline to 4.3 at 12 weeks of treatment. 12 months after start of treatment, 14 women who had received EA had a median number of flushes/24 hours of 4.9, and at 24 months, seven women treated by EA had 2.1 flushes/24 hours. The HT group had a baseline median number of flushes/24 hours of 6.6 and 0.0 at 12 weeks.

Long-term follow-up of acupuncture and hormone therapy on hot flushes in women with breast cancer: a prospective, randomized, controlled multicenter trial. Climacteric. 2008 Apr;11(2):166-74.