Surgical and anesthetic features
ASA physical status classes were similar between MF and NF anesthesia groups. MF and NF anesthesia were regularly distributed over surgical departments and procedure types. Duration of anesthesia and surgery lasted significantly longer in the MF anesthesia group than in the NF anesthesia group. As a consequence, PP duration was also significantly longer in the former. The amount of anesthetic gas consumption was significantly lower in the MF anesthesia group compared with the NF anesthesia counterparts. Perioperative opioid medication requirements were comparable in both groups. 