The visual analogue scale (VAS) is widely used for pain assessment. However, the minimum clinically relevant change remains a debated question, even with regard to the method of assessment. On the one hand, considering intra-individual change in acute pain, Todd et al suggested a crude change of 13 mm (for a 100 mm VAS) to discriminate between reporting a little less or a little more pain.¹ In the study of Farrar et al the best cut off points were estimated at −20 mm (for a crude change) or −33% (for a relative change) to best discriminate between patients who require a rescue opioid dose or not.² Similar results were also derived when considering patient self appreciation of improvement in chronic pain.³ On the other hand, Redelmeier et al suggested focusing on interindividual change …