Table 1.
Baseline characteristics of patients.
| Variable | Overall n = 105 |
Survivors n = 77 |
Non-survivors n = 28 |
|---|---|---|---|
| Age, years | 49.5 ± 22.6 | 43.4 ± 21.0 | 66.3 ± 18.1 |
| Age < 18 years, n (%) | 9 (9) | 8 (10) | 1 (4) |
| Male gender, n (%) | 71 (68) | 51 (66) | 20 (71) |
| ISS Total, median (IQR) | 25 (17 to 34) | 25 (14 to 34) | 31 (25 to 38) |
| ISS = 75, n (%) | 1 (1) | 0 | 1 (4) |
| ISS Thorax, median (IQR) | 0 (0 to 2) | 0 (0 to 2) | 0 (0 to 2) |
| Missing (ISS Thorax), n (%) | 12 (11) | 9 (12) | 3 (11) |
| Cardiopulmonary parameters | |||
| Systolic BP, mmHg | 127 ± 33 | 127 ± 29 | 125 ± 43 |
| Diastolic BP, mmHg | 78 ± 28 | 80 ± 30 | 72 ± 21 |
| Pulse, bpm | 93 ± 26 | 92 ± 24 | 93 ± 32 |
| SpO2, median (IQR) | 100 (98 to 100) | 100 (98 to 100) | 99.5 (94.8 to 100) |
| Temperature, °C | 35.9 ± 0.93 | 35.9 ± 0.93 | 35.9 ± 0.98 |
| Missing, n (%) | 16 | 11 | 5 |
| Arterial blood gas | |||
| pH, median (IQR) | 7.31 (7.26 to 7.35) | 7.31 (7.28 to 7.36) | 7.31 (7.19 to 7.33) |
| BE, mmol/l median (IQR) | − 3.6 (− 6.4 to − 1.9) | − 3.6 (− 5.8 to − 1.7) | − 4.9 (− 8.4 to − 2.3) |
| HCO3−, mmol/l median (IQR) | 21.9 (19.9 to 23.6) | 21.5 (20.5 to 23.6) | 21.1 (19.6 to 23.4) |
| Lactate, mmol/l median (IQR) | 2.0 (1.2 to 3.4) | 1.9 (1.2 to 2.7) | 2.8 (1.4 to 4.5) |
| PaCO2, kPa median (IQR) * | 6.0 (5.5 to 6.8) | 5.9 (5.5 to 6.6) | 6.4 (5.7 to 6.8) |
| PaO2, kPa median (IQR) | 28.2 (17.6 to 48.9) | 34.3 (19.6 to 51.5) | 23.1 (14.9 to 29.8) |
| Hemoglobin, g/l | 122 ± 21 | 122 ± 20 | 119 ± 24 |
| Glucose, mmol/l median (IQR) | 8.0 (6.3 to 10.1) | 7.5 (6.0 to 8.9) | 10.2 (8.1 to 13.2) |
Data was complete if not otherwise specified. Continuous variables are reported as mean ± SD = (standard deviation) if normally distributed and not stated otherwise.
BP blood pressure, IQR interquartile range, ISS injury severity score, bpm beats per minute, SpO2 peripheral capillary oxygen saturation.
*PaCO2 = same parameter as shown in detail on Table 2 (initial measure).