Table 2.
Index-event characteristics in the study population in the first year (N=734)*
| On-time | Delayed | P ** |
Median (IQR
25-75%
) of
D2D time |
P *** | |
|---|---|---|---|---|---|
| 586 (79.8) | 148 (20.1) | ||||
| Pain-to-door (min) | 230 (100-538) | 322 (124-615) | <0.001 | ||
| Door-to-device (min) | 50 (39-62) | 165 (110-225) | <0.001 | ||
| ST-Elevation Leads * | 0.041 | ||||
| Precordial | 268 (82.7) | 56 (17.3) | 0.118 | 55 (40-75) | |
| Lateral | 88 (85.5) | 15 (14.5) | 0.153 | 54 (40-75) | |
| Inferior | 246 (79.0) | 65 (21.0) | 0.507 | 53 (40-85) | |
| Posterior | 64 (84.2) | 12 (15.8) | 0.352 | 55 (43-80) | |
| Right side | 58 (85.3) | 10 (14.7) | 0.271 | 50 (39-64) | |
| BBB-MI | 2 (40.0) | 3 (60.0) | 0.027 | 135 (48-216) | |
| Culprit Vessel | 0.463 | ||||
| Left main | 2 (66.7) | 1 (33.3) | 0.481 | 56 (-) | |
| LAD | 267 (82.4) | 57 (17.6) | 0.177 | 55 (40-76) | |
| LCX | 63 (86.3) | 10 (13.7) | 0.169 | 56 (40-76) | |
| RCA | 161 (78.5) | 44 (21.5) | 0.483 | 55 (40-85) | |
| SVG | 7 (87.5) | 1 (12.5) | 0.614 | 47 (37-59) | |
| Diagonal | 19 (82.6) | 4 (17.34) | 0.815 | 59 (40-85) | |
| OM | 26 (78.8) | 7 (21.2) | 0.961 | 62 (44-87) | |
| Ramus | 0 | 2 (100) | 0.038 | 179 (-) | |
| PDA | 10 (62.5) | 6 (37.5) | 0.078 | 75 (42-118) | |
| PLB | 13 (68.4) | 6 (31.6) | 0.193 | 68 (44-126) | |
| Season | 0.115 | ||||
| Spring | 105 (84.0) | 20 (16.0) | 0.204 | 53 (40-70) | |
| Summer | 158 (79.4) | 41 (20.6) | 0.872 | 55 (41-87) | |
| Fall | 228 (77.8) | 65 (22.2) | 0.265 | 56 (40-81) | |
| Winter | 87 (81.3) | 20 (18.7) | 0.681 | 55 (44-82) | |
| Route of Arrival | 0.016 | ||||
| Ambulance-PPCH | 31 (81.9) | 4 (10.9) | 0.138 | 45 (34-55) | |
| Ambulance-NPPCH | 27 (93.1) | 2 (6.9) | 0.084 | 50 (41-60) | |
| Self-transported | 437 (79.5) | 113 (20.5) | 0.357 | 56 (42-85) | |
| Admitted patient | 7 (63.6) | 4 (36.4) | 0.158 | 75 (34-160) | |
| Work Shifts of ED | 0.221 | ||||
| One | 267 (82.9) | 55 (17.1) | 0.063 | 55 (40-75) | |
| Two | 174 (76.7) | 53 (23.3) | 0.153 | 57 (42-86) | |
| Three | 145 (78.4) | 40 (21.6) | 0.571 | 55 (40-83) |
BBB- MI, Bundle branch block myocardial infarction; LAD, Left anterior descending artery; LCX, Left circumflex artery; RCA, Right coronary artery; SVG, Saphenous vein graft, OM, Obtuse marginal; PDA, Posterior descending artery; PLB, Posterior left ventricular branch; PPCH, Primary percutaneous coronary intervention capable hospital; NPPCI, Non–primary percutaneous coronary intervention capable hospital; ED, Emergency Department; Work shifts of ED, Work shift of the emergency department as Shift 1: 8 Am to 4 PM, Shift 2: 4 PM to 12 AM, and Shift 3: 12 AM to 8 AM
Data are presented as n (%) or median (IQR 25-75%).
P value for the comparison of the percentage of each contributing factor between the 2 groups (on time and delayed)
P value for the comparison of the median D2D time between the subgroups