| Overall population | Negative PLRb and pupil mydriasisd | Negative PLRb and normal pupil diametere | Positive PLRc and pupil mydriasisd | Positive PLRc and normal pupil diametere | |||||
---|---|---|---|---|---|---|---|---|---|---|
 | n = 723 | n = 253 | n = 219 | n = 45 | n = 206 | |||||
Age, years | 57.5 | (13.3) | 56.4 | (13.2) | 59.4 | (12.8) | 53.27 | (13.1) | 57.6 | (13.7) |
Sex, male | 606 | (83.8) | 219 | (86.6) | 189 | (86.3) | 37 | (82.2) | 161 | (78.2) |
Initial rhythm at the scene | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Shockable rhythm at the scene | 528 | (73.1) | 175 | (69.7) | 161 | (74.2) | 39 | (86.7) | 153 | (75.0) |
 Pulseless electric activity | 149 | (20.6) | 56 | (22.1) | 45 | (20.5) | 6 | (13.3) | 42 | (20.4) |
 Asystole | 40 | (5.5) | 20 | (7.9) | 11 | (5.0) | 0 | (0.0) | 9 | (4.4) |
Witnessed cardiac arrest | 568 | (78.6) | 197 | (77.9) | 171 | (78.1) | 40 | (88.9) | 160 | (77.7) |
Bystander CPR | 426 | (58.9) | 148 | (58.5) | 128 | (58.4) | 31 | (68.9) | 119 | (57.8) |
Prehospital intervention | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Epinephrine administration | 254 | (35.1) | 99 | (39.1) | 76 | (34.7) | 17 | (37.8) | 62 | (30.1) |
 Defibrillation | 482 | (66.7) | 152 | (60.1) | 154 | (70.3) | 35 | (77.8) | 141 | (68.4) |
Cardiogenic cardiac arrest | 625 | (86.4) | 211 | (83.4) | 194 | (88.6) | 40 | (88.9) | 180 | (87.4) |
Percutaneous coronary intervention | 354 | (49.0) | 109 | (43.1) | 105 | (47.9) | 22 | (48.9) | 118 | (57.3) |
Drug administration at ICU admissionf | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Vasopressorsg | 314 | (43.4) | 128 | (53.3) | 94 | (44.3) | 19 | (43.2) | 73 | (35.6) |
 Sedativesh | 371 | (51.3) | 79 | (32.6) | 136 | (63.8) | 25 | (56.8) | 131 | (64.2) |
 Analgesicsi | 344 | (47.6) | 91 | (36.3) | 114 | (53.3) | 25 | (56.8) | 114 | (56.2) |
Body temperature at ICU admission, ℃ | 34.4 | (1.2) | 34.4 | (1.4) | 34.4 | (1.1) | 34.8 | (1.2) | 34.2 | (1.2) |
 Estimated low flow timej | 54.8 | (18.1) | 59.7 | (18.0) | 52.4 | (19.2) | 55.73 | (20.8) | 51.4 | (15.0) |
 Time from hospital arrival to ICU admissionk | 199.0 | (87.7) | 188.2 | (86.6) | 200.9 | (95.9) | 192.71 | (56.0) | 211.7 | (84.7) |
Favourable neurological outcome at hospital discharge | 74 | (10.2) | 4 | (1.6) | 10 | (4.6) | 13 | (28.9) | 47 | (22.8) |
Survival to hospital discharge | 195 | (27.0) | 11 | (4.3) | 51 | (23.3) | 26 | (57.8) | 107 | (51.9) |
CPC score at hospital discharge | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
1 | 59 | (8.2) | 3 | (1.2) | 8 | (3.7) | 10 | (22.2) | 38 | (18.4) |
2 | 15 | (2.1) | 1 | (0.4) | 2 | (0.9) | 3 | (6.7) | 9 | (4.4) |
3 | 28 | (3.9) | 1 | (0.4) | 7 | (3.2) | 5 | (11.1) | 15 | (7.3) |
4 | 93 | (12.9) | 6 | (2.4) | 34 | (15.5) | 8 | (17.8) | 45 | (21.8) |
5 | 528 | (73.0) | 242 | (95.7) | 168 | (76.7) | 19 | (42.2) | 99 | (48.1) |
Length of ICU stay, days | 7.4 | (9.4) | 3.1 | (3.8) | 7.8 | (9.2) | 14.1 | (12.7) | 10.9 | (11.2) |
Length of hospital stayl, days | 15.5 | (25.2) | 4.6 | (14.8) | 15.2 | (23.0) | 31.2 | (32.1) | 25.7 | (29.5) |