Compared with thrombolysis during control weeks , there was a reduction of 15 minutes ( 95 % CI , 11-19 ) in alarm-to-treatment times in the catchment area during STEMO weeks ( 76.3 min ; 95 % CI , 73.2-79 .3 vs 61.4 min ; 95 % CI , 58.7-64 .0 ; P < .001 ) .