Pairwise comparisons among the @ 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 @ minutes after intrathecal injection -LSB- ( @ ) = @ , P = @ -RSB- , with a mean rank sedation score of @ for dexmedetomidine , @ for midazolam , and @ for control .