The frequencies of all strokes ( 9.1 % vs. 3.4 % ; RR : 2.66 ; 95 % CI : 0.87 to 8.12 ; p = 0.11 ) and repeat hospitalization for heart failure ( 7.4 % vs. 12.8 % ; RR : 0.58 ; 95 % CI : 0.26 to 1.27 ; p = 0.19 ) did not statistically significantly differ between the 2 groups .