The magnitude of improvement was higher in the rhythm control group than the rate control group ( unadjusted difference : -0.75 point ; 95 % confidence interval , -1.31 to -0.19 ; P = 0.01 ; propensity score-adjusted difference : -0.71 point ; 95 % confidence interval , -1.31 to -0.11 ; P = 0.02 ) .