Median baseline prehospital delay times did not differ significantly between the groups at baseline ( Mann-Whitney U , p = 0.34 ) ( CONTROL : 4.28 h , 25 ( th ) percentile = 1.71 , 75 ( th ) percentile = 17.37 ; Intervention 3.96 h , 25 ( th ) percentile = 1.53 , 75 ( th ) percentile = 18.51 ) .