Pairwise comparisons among the 3 groups with Bonferroni adjustment revealed that patients from the dexmedetomidine group were more sedated in comparison to the midazolam and control groups at the end of the first 15 minutes after intrathecal injection [ ( 2 ) = 7.157 , P = 0.028 ] , with a mean rank sedation score of 35.58 for dexmedetomidine , 25.00 for midazolam , and 30.93 for control .