Other factors associated with recurrent F/SUTI included presence of BBD at baseline ( adjusted hazard ratio : 2.07 [ 95 % confidence interval ( CI ) : 1.09-3 .93 ] ) and presence of renal scarring on the baseline ( 99m ) Tc-labeled dimercaptosuccinic acid scan ( adjusted hazard ratio : 2.88 [ 95 % CI : 1.22-6 .80 ] ) .