Table 2.
Time interval difference between traditional referral and transfer with protocol.
| Variables | Transferred through protocol group (n = 262) |
Traditional referral process group (n = 107) |
p value |
|---|---|---|---|
| Door-to-ECG time (mins) | 2 (1, 4) | 2 (0, 4) | 0.618 |
| Killip I/II | 2 (1, 4) | 2 (0, 4.75) | 0.921 |
| Killip III/IV | 2 (1, 5) | 1 (0, 2) | 0.944 |
| Door-to-CathLab time (mins) | 27 (20, 33) | 28 (21, 36) | 0.466 |
| Killip I/II | 25 (19, 33) | 28 (21, 36) | 0.060 |
| Killip III/IV | 31 (25, 36) | 27 (20, 37) | 0.438 |
| CathLab-to-balloon time (mins) | 18 (14, 22) | 18 (13, 23) | 0.497 |
| Killip I/II | 17 (14, 21.75) | 16.5 (13, 21) | 0.729 |
| Killip III/IV | 18 (13, 22.25) | 22 (16, 31) | 0.041 |
| Door-to-balloon time (mins) | 45 (37, 55) | 47 (38, 58) | 0.388 |
| Killip I/II | 43 (36, 54) | 46 (36.25, 57.75) | 0.375 |
| Killip III/IV | 51.5 (40.75, 61) | 50 (44, 64) | 0.672 |
| Pain to door of STEMI receiving center time (mins) | 163 (116, 264) | 174 (118, 275) | 0.309 |
| Killip I/II | 154 (115, 240) | 180.5 (113, 274.75) | 0.154 |
| Killip III/IV | 185 (122.25, 314.25) | 160 (118, 247) | 0.777 |
| Pain to ECG time (mins) | 165 (119, 266) | 174 (118, 274) | 0.123 |
| Killip I/II | 157.5 (117.5, 239.25) | 186 (119.5, 286.0) | 0.043 |
| Killip III/IV | 185 (125, 330.5) | 161 (127, 244) | 0.777 |
| Pain to balloon (mins) | 199 (161, 306) | 214 (165, 327) | 0.159 |
| Killip I/II | 194.5 (159.25, 270) | 215.5 (160.5, 327.75) | 0.056 |
| Killip III/IV | 229 (172, 381.25) | 212 (176, 327) | 0.619 |
| Door-to-balloon time < 60 mins | 85.1% (223) | 79.4% (85) | 0.183 |
| Killip I/II | 88.2% (180) | 81.0% (68) | 0.104 |
| Killip III/IV | 74.1% (43) | 73.9% (17) | 0.983 |
| Door-to-balloon time < 90 mins | 99.2% (260) | 99.1% (106) | 0.868 |
| Killip I/II | 100% (204) | 100% (84) | 1.000 |
| Killip III/IV | 96.6% (56) | 95.7% (22) | 0.847 |
Data are expressed as median (25% percentile, 75% percentile) or % (n); CathLab: catheterization laboratory; ECG: electrocardiogram.