In the intention-to-treat analysis , the mean ( SD ) systolic BP decreased 14.82 ( 11.71 ) mm Hg in the amlodipine group and 13.11 ( 12.69 ) mm Hg in the losartan group , and amlodipine proved noninferior to losartan ( mean difference , 1.71 mm Hg [ 95 % CI , -3.83 to 7.26 ] ) .