After multivariable adjustment , the hazard ratio ( HR ) for 180 day mortality remained similar for the LowEF [ HR 0.96 , 95 % confidence interval ( CI ) 0.75-1 .24 ; P = 0.77 ] and IntEF ( 0.91 , 95 % CI 0.66-1 .3 ; P = 0.58 ) compared to PresEF patients .