"Association Between Urinary Albumin Excretion and Coronary Heart Disease in Black vs White Adults" 
JAMA Aug 21
http://jama.jamanetwork.com/article.aspx?articleid=1730510 
"Conclusions and Relevance   Higher urinary ACR was associated with greater risk of incident but not recurrent CHD in black individuals when compared with white individuals. These data confirm that black individuals appear more susceptible to vascular injury."