Table 4

Relationship between EMS time intervals, DTB time and total system delay time

DTB time >60 minSystem delay time >120 min
aOR (95% CI)P valueaOR (95% CI)P value
With haemodynamic complications
 Response time >11 min0.78 (0.53 to 1.16)0.221.74 (0.94 to 3.22)0.076
 Scene time >20 min1.36 (0.84 to 2.20)0.2118.30 (4.15 to 16.60)<0.001
 Transport time >21 min0.71 (0.50 to 1.02)0.0647.26 (4 to 13.14)<0.001
 DTB >60 min--45.31 (22.56 to 91.01)<0.001
Without haemodynamic complications
 Response time >11 min1.00 (0.84 to 1.19)0.9913.54 (2.74 to 4.57)<0.001
 Scene time >20 min0.81 (0.69 to 0.96)0.0163.29 (2.57 to 4.20)<0.001
 Transport time >21 min0.66 (0.56 to 0.78)<0.00110.63 (7.76 to 14.55)<0.001
 DTB >60 min--68.06 (48.66 to 95.21)<0.001
  • Adjusted for age and sex.

  • aOR, adjusted OR; DTB, door-to-balloon; EMS, emergency medical service.