The left-ventricular-mass index decreased more in the low-blood-pressure group than in the standard-blood-pressure group ( -1.17 vs. -0.57 g per square meter per year , P < 0.001 ) ; urinary albumin excretion was reduced by 3.77 % with the low-pressure target and increased by 2.43 % with the standard target ( P < 0.001 ) .