Univariate and multivariable logistic regression of patient factors according to 28-day mortality
| Variable | Missing | Alive* | Deceased* | Univariate | Multivariable | ||
| OR (95% CI) | P value | Adjusted OR (95% CI) | P value | ||||
| Age | 0 | 29 (22–42) | 52 (30–68) | 1.05 (1.03 to 1.06) | <0.001 | 1.08 (1.06 to 1.12) | <0.001 |
| Motor score <4 | 0 | 55 (49.5) | 56 (50.5) | 9.55 (5.16 to 18.52) | <0.001 | 8.65 (3.2 to 26.3) | <0.001 |
| Pupillary abnormalities | 7 | 34 (40.0) | 51 (60.0) | 13.11 (7.01 to 25.47) | <0.001 | 14.29 (5.34 to 43.09) | <0.001 |
| Polytrauma TBI† | 16 | 66 (67.3) | 32 (32.7) | 1.71 (0.97 to 3.0) | 0.06 | 1.28 (0.51 to 3.24) | 0.59 |
| Prolonged hypotension | 5 | 54 (65.9) | 28 (34.1) | 1.88 (1.06 to 3.34) | 0.03 | 1.45 (0.5 to 4.25) | 0.49 |
| Prolonged hypoxia | 5 | 39 (56.5) | 30 (43.5) | 3.23 (1.79 to 5.85) | <0.001 | 4.86 (1.65 to 15.61) | 0.005 |
| Arrival ETCO2 <30 mm Hg | 14 | 47 (58.8) | 33 (41.2) | 2.87 (1.61 to 5.11) | <0.001 | 1.28 (0.5 to 3.21) | 0.6 |
*Number (%) or median (IQR).
†Polytrauma TBI defined as an HAIS ≥3 with one other AIS ≥3.
AIS, Abbreviated Injury Scale; ETCO2, end-tidal carbon dioxide; HAIS, ‘Head’ Abbreviated Injury Scale; TBI, traumatic brain injury.