The rate of failure for blood pressure was 0.31 [ 95 % CI , 0.23-0 .41 ] per quarter for the group medical visit arm , 0.22 [ 95 % CI , 0.16-0 .30 ] per quarter for the CRRC individual arm and , 0.53 [ 95 % CI , 0.40-0 .71 ] per quarter the control arm , p < 0.001 .