There was no improvement in the global QoR-40 score at 24 hours between the perineural dexamethasone and saline , median ( 97.5 % CI ) difference of -3 ( -7 to 3 ) ; IV dexamethasone and saline , median difference of -1 ( -8 to 5 ) ; or perineural dexamethasone and IV dexamethasone median difference of -2 ( -6 to 5 ) .