How effective was the ginger extract?
After 6 weeks of treatment, a higher percentage of people (63 per cent) were classified as responders for improvement of knee pain on standing in the ginger extract group than in the group given placebo (dummy tablets). Pain on standing was the main variable used to measure efficacy in this study and is a standard measure of pain in medical studies. Pain on standing is measured using a visual scale. People are shown the scale and asked to mark the level of their pain on the scale. This difference between the ginger-treated group and the dummy tablet group was statistically significant, meaning that there was a low probability that the result occurred by chance.
