Fig. 2.
Per-hospital predicted costs by hospital-level neuraxial volume for hip and knee replacement surgery. *Derived from Model III in table 5; adjusted for age, sex, race, insurance type, hospital annual procedure volume, hospital teaching status, hospital location, hospital bed size, year of procedure, general anesthesia use, patient-controlled analgesia use, intravenous acetaminophen, nonsteroidal antiinflammatory drugs, cyclooxygenase-2 Inhibitors, ketamine, pregabalin/gabapentin, peripheral nerve block use, Deyo-Charlson Comorbidity Index, history of substance use/abuse, pain conditions, psychiatric comorbidities, sleep apnea, and obesity.