Multivariate logistic regression analysis, knee surgery.
* Variables entered on step 1: Sex, Preoperative pain, Preoperative opioid use, General anesthesia, Ketamine. ** Variables entered on step 1: Sex, Cardiovascular comorbidity, Preoperative opioid use, Gabapentinoids. *** Variables entered on step 1: Age, NSAID, Ketamine. **** Variables entered on step 1: Sex, BMI, Cardiovascular comorbidity, General Pain syndrome, NSAID, Ketamine, Gabapentinoids, Clonidine. (XLSX)