Chronic Postsurgical Pain: Multivariate Prediction Model

"The outcome variable is the presence of CPSP assessed 3 months after surgery and defined as an average pain intensity of at least 3 on the NRS scale (11-point one-dimensional pain scale) in the last three days, and pain localized to the surgical field (or in the lesion area) projected into the innervation territory of a nerve located in this area or referred to a dermatome.~Separate prediction models will be developed using data derived from surveys conducted at the relevant time points for the development of the risk index."