Death from any cause occurred in 5.3 % of the patients ( 191 of 3621 patients ) in the thrombus-aspiration group , as compared with 5.6 % ( 202 of 3623 ) in the PCI-only group ( hazard ratio , 0.94 ; 95 % confidence interval [ CI ] , 0.78 to 1.15 ; P = 0.57 ) .