The 24-h ambulatory SBP changed-6 .8 15.1 mm Hg in the denervation group and-4 .8 17.3 mm Hg in the sham group : difference of-2 .0 mm Hg ( 95 % confidence interval [ CI ] : -5.0 to 1.1 ; p = 0.98 with a 2 mm Hg superiority margin ) .