Thrombolysis rates in ischemic stroke were 29 % ( 310/1070 ) during STEMO weeks and 33 % ( 200/614 ) after STEMO deployment vs 21 % ( 220/1041 ) during control weeks ( differences , 8 % ; 95 % CI , 4 % -12 % ; P < .001 , and 12 % , 95 % CI , 7 % -16 % ; P < .001 , respectively ) .