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)
As the trial wore on, the «expensive» cream group reported the pain becoming more and more intense, whereas the «cheap» cream group experienced a slight decrease in pain. (sciencemag.org)
Volunteers taking CTII had a 20 % decrease in pain during exercise, while glucosamine / chondroitin only relieved pain by 6 %. (appliedhealth.com)