In multivariable Cox analyses adjusting for randomized treatment , age , sex , diabetes , history of heart failure , myocardial infarction , ischemic heart disease , stroke , peripheral vascular disease , smoking status , baseline body mass index , serum total and high-density lipoprotein cholesterol , creatinine , glucose , and urine albumin/creatinine ratio as standard risk factors , and for incident myocardial infarction , in-treatment heart rate , systolic and diastolic pressure , Cornell product , and Sokolow-Lyon voltage LVH treated as time-varying covariables , black race remained associated with a 45 % decreased risk of developing new AF ( HR = 0.55 ; 95 % CI = 0.35-0 .87 ; P = 0.01 ) .