Table 3.
Interaction analysis between the cervical spine immobilization and prehospital mean arterial pressure on study outcome.
| Immobilization (-) | Immobilization (+) | ||
|---|---|---|---|
| aOR (95% CI) | aOR (95% CI) | P for interaction | |
| In-hospital mortality | |||
| Total patients | .88 | ||
| Normal MAP | reference | 1.45 (0.74–1.88) | |
| Decreased MAP | reference | 1.33 (0.92–1.75) | |
| Patients with TBI | .21 | ||
| Normal MAP | reference | 1.29 (0.98–1.45) | |
| Decreased MAP | reference | 1.22 (0.88–1.63) | |
| Poor Functional outcome | |||
| Total patients | .98 | ||
| Normal MAP | reference | 1.17 (0.95–1.46) | |
| Decreased MAP | reference | 1.20 (0.88–1.50) | |
| Patients with TBI | < .01 | ||
| Normal MAP | reference | 1.12 (0.93–1.24) | |
| Decreased MAP | reference | 1.38 (1.14–1.56) |
aOR = adjusted odds ratio, CI = confidence interval, MAP = mean arterial pressure, TBI = traumatic brain injury.