Serum substance P levels are associated with severity and mortality in patients with severe traumatic brain injury

Table 2 Multiple binomial logistic regression analysis to predict 30-day mortality^a

		Odds ratio	95% confidence interval	P -value
First model
	APACHE II score	1.39	1.188 to 1.622	<0.001
	CT with high risk of death (classes III, IV and VI)	4.61	1.067 to 19.967	0.04
	Serum substance P levels >299 pg/ml	6.64	1.507 to 29.238	0.01
	Sex female	2.66	0.591 to 11.966	0.20
Second model
	Age	1.08	1.029 to 1.122	<0.001
	GCS score	0.56	0.396 to 0.776	<0.001
	Serum substance P levels >299 pg/ml	7.28	1.650 to 32.086	0.01
	Female sex	3.92	0.765 to 20.118	0.10

^aAPACHE II, Acute Physiology and Chronic Health Evaluation; CT, Computed tomography; GCS, Glasgow Coma Scale.

ISSN: 1364-8535