Duration of analgesia and total postoperative fentanyl consumption
| Variable | Group R | Group RS | Group RM | Group RSM | P |
| Duration of analgesia (min) | 440.0±109.6 | 611.5±133.0 | 602.5±108.5 | 824.2±105.1 | <0.001 |
| Total postoperative fentanyl consumption (μg) | 369.0±134.2 | 243.0±175.2 | 237.0±98.7 | 106.0±84.0 | <0.001 |
Duration of analgesia and total postoperative fentanyl consumption data are expressed as means±SD.
R, ropivacaine; RM, ropivacaine+dexmedetomidine; RS, ropivacaine+dexamethasone; RSM, ropivacaine+dexamethasone+dexmedetomidine.