Table 2.
Transfer data separated by mode of transport. IQR (Interquartile Range), N (sample size), NIHSS (NIH Stroke Scale), ASPECTS (Alberta Stroke Program Early CT Score), tPA (tissue Plasminogen Activator), LKW (Last Known Well), BP (Blood Pressure).
| Total | Helicopter | Ground | |||||
|---|---|---|---|---|---|---|---|
|
|
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| Median (IQR)/Count (%) | N | Median (IQR)/Count (%) | N | Median (IQR)/Count (%) | N | P | |
| NIHSS at Spoke | 15 (11-20) | 139 | 16 (11-20) | 67 | 13 (10-19) | 72 | 0.0632 |
| ASPECTS at Spoke | 10 (8-10) | 234 | 10 (8-10) | 114 | 10 (9-10) | 120 | 0.2184 |
| Dense Vessel Sign at Spoke | 76 (37) | 207 | 42 (42) | 101 | 34 (32) | 106 | 0.1560 |
| tPA given at Spoke | 156 (67) | 234 | 81 (71) | 114 | 75 (63) | 120 | 0.1654 |
| Road Distance (km) | 86 (66-97) | 234 | 97 (83-111) | 114 | 69 (34-97) | 120 | >0.0001 |
| Line Distance (km) | 74 (54-83) | 234 | 83 (74-96) | 114 | 55 (21-83) | 120 | >0.0001 |
| Weekend | 66 (28) | 234 | 27 (24) | 114 | 39 (33) | 120 | 0.1342 |
| Night | 121 (52) | 234 | 56 (49) | 114 | 65 (54) | 120 | 0.4403 |
| Low Visibility (<16 km) | 33 (14) | 234 | 6 (5) | 114 | 27 (23) | 120 | 0.0002 |
| Wind Speed (km/h) | 17 (11-22) | 234 | 17 (13-22) | 114 | 15 (9-22) | 120 | 0.2471 |
| Ideal Transfer Time (min) | 102 (96-123) | 234 | 99 (96-102) | 114 | 118 (99-130) | 120 | >0.0001 |
| Actual Transfer Time (min) | 132 (103-165) | 234 | 128 (103-148) | 114 | 137 (101-175) | 120 | 0.1009 |
| Delay (min) | 25 (2-45) | 234 | 30 (4-45) | 114 | 16 (-2-45) | 120 | 0.1245 |
| Hub Arrival-LKW Time (h) | 4.2 (3.5-5.2) | 234 | 4.0 (3.3-5.0) | 114 | 4.5 (3.7-5.3) | 120 | 0.0250 |
| Hub Arrival Within 6h | 202 (86) | 234 | 98 (86) | 114 | 104 (87) | 120 | 0.8759 |
| Systolic BP at hub | 153 (135-169) | 232 | 152 (135-169) | 112 | 155 (136-169) | 120 | 0.8394 |
| Atrial Fibrillation at hub | 76 (32) | 234 | 39 (34) | 114 | 37 (31) | 120 | 0.5814 |
| Hemiparesis at hub | 214 (91) | 234 | 100 (88) | 114 | 114 (95) | 120 | 0.0465 |
| Altered Consciousness at hub | 75 (32) | 234 | 38 (33) | 114 | 37 (31) | 120 | 0.6821 |
| Aphasia at hub | 167 (71) | 234 | 77 (68) | 114 | 90 (75) | 120 | 0.2073 |
| NIHSS at hub | 15 (10-20) | 234 | 16 (10-20) | 114 | 13 (9-19) | 120 | 0.0764 |
| ASPECTS at hub | 8 (5-9) | 200 | 7 (4-9) | 98 | 8 (6-9) | 102 | 0.0346 |
| tPA given at hub | 7 (3) | 234 | 4 (4) | 114 | 3 (3) | 120 | 0.6507 |