RESULTS	Low-frequency low-intensity electrotherapy did not reduce lymphoedema volume ( mean of change = 19.77 mL , P = 0.36 ) , but significant reductions were observed in pain , heaviness and tightness ( mean of change = 13.1 , 16.2 and 6.4 mm , respectively ) , and FACT-B +4 summaries improved significantly ( Trial Outcome Index mean of change = 5.4 , P = 0.015 ) .\