Table 1.
Baseline characteristics of the study population (n = 308)
| All | Survived | Died | P | N | |
|---|---|---|---|---|---|
| N = 308 | N = 197 | N = 111 | |||
| Age (years) |
52 [27;71] |
44 [23;64] |
64 [37;79] |
< 0.001 | 308 |
| Sex | 0.817 | 308 | |||
| Male | 234 (76%) | 151 (77%) | 83 (75%) | ||
| Female | 74 (24%) | 46 (23%) | 28 (25%) | ||
| Glasgow Coma Scale (GCS) | < 0.001 | 304 | |||
| 4–8 | 154 (51%) | 107 (55%) | 47 (43%) | ||
| 9–15 | 46 (15%) | 41 (21%) | 5 (5%) | ||
| 3 | 104 (34%) | 48 (24%) | 56 (52%) | ||
| Systolic blood pressure in resuscitation room (mm Hg) | 122 [104;138] |
124 [108;139] |
119 [96;136] |
0.045 | 293 |
| PetCO2 in resuscitation room (kPa) | 4.50 [3.87;4.93] | 4.67 [4.10;5.07] |
4.13 [3.47;4.70] |
< 0.001 | 291 |
| PaCO2 in resuscitation room (kPa) | 5.99 [5.47;6.79] | 5.87 [5.46;6.53] |
6.40 [5.47;7.33] |
0.019 | 270 |
| Injury severity score | 29 [20;38] | 25 [17;34] | 32 [25;41] | < 0.001 | 301 |
| Vasopressor use | 0.132 | 284 | |||
| No | 215 (76%) | 145 (79%) | 70 (70%) | ||
| Yes | 69 (24%) | 39 (21%) | 30 (30%) | ||
| On-scene time (min) | 30.0 [24.0;37.0] | 30.5 [24.0;38.0] |
29.0 [24.0;36.0] |
0.392 | 307 |
| Pre-hospital time (min) | 59.0 [51.0;68.0] | 60.0 [52.0;69.0] |
59.0 [50.0;67.0] |
0.223 | 305 |
PetCO2: end-tidal partial pressure of CO2. PaCO2: arterial partial pressure of CO2