That's compared to just 8 percent in the placebo group. (sciencedaily.com)
Over that period, the pain inhibition experienced by patients in the placebo group increased steadily, reaching an average 30 % decrease in pain levels by 2013. (sciencedaily.com)
At treatment completion, 65 % of the women receiving iodine reported decreased pain compared with 33 % of women in the placebo group. (ods.od.nih.gov)