The minimal important change for the EQ VAS based on the SF-36 health transition item: observations from 25772 spine surgery procedures.
Anders JoelsonFredrik NereliusFreyr Gauti SigmundssonJan KarlssonPublished in: Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation (2022)
For EQ VAS, we recommend a MIC threshold of 12 points for improvement after surgery for disk herniation or spinal stenosis, whereas the corresponding threshold for deterioration is - 7 points. There are marked differences between the EQ VAS MIC for improvement and deterioration after surgery for disk herniation or spinal stenosis. The MIC value varied depending on the method used for MIC estimation.