Sexual & reproductive healthcare : official journal of the Swedish Association of Midwives
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Clinical Trial
Minimal clinically important difference for pain on the VAS scale and the relation to quality of life in women with endometriosis.
The minimal important difference can be helpful in interpreting data from clinical trials. The objective of the study was to calculate the minimal important difference for improvement on the VAS scale for women with endometriosis. ⋯ If the patients have a pain level of at least 50mm on VAS scale at inclusion, the cut off for success in clinical trials is suggested to be defined as an either >40mm or a >50% decrease on VAS scale. Trial registry ClinicalTrials.gov Identifier: NCT01329796.