Table 3.

Univariate and multivariate logistic regression analysis of risk factors for 30-day mortality in training set.

Variables	Univariate Logistic Regression Analysis			Multivariate Logistic Regression Analysis
	OR	95% Cl	p	OR	95% Cl	p
Age	1.031	1.009–1.054	0.006	1.054	1.023–1.087	0.001
Male gender	1.044	0.753–1.447	0.796
Diabetes	1.370	0.940–1.996	0.101
Hypertension	0.774	0.558–1.074	0.125
Systolic blood pressure	0.992	0.985–0.998	0.013	1.002	0.994–1.010	0.667
Diastolic blood pressure	0.991	0.982–1.001	0.077
Heart rate	1.007	0.997–1.016	0.171
Respiratory rate	0.991	0.960–1.024	0.595
Body temperature	0.783	0.709–0.866	<0.001	0.825	0.728–0.934	0.002
SpO2	1.052	0.993–1.115	0.084
Pupillary nonreactivity			<0.001			0.001
None	1.000	[Reference]		1.000	[Reference]
One size	1.930	0.995–3.743	0.052	1.509	0.668–3.410	0.322
Two size	9.797	5.546–17.305	<0.001	3.745	1.818–7.716	<0.001
GCS	0.786	0.754–0.820	<0.001	0.888	0.831–0.948	<0.001
AIS face	0.899	0.700–1.154	0.403
AIS head	2.767	1.993–3.841	<0.001	2.383	1.309–4.339	0.004
AIS chest	1.202	1.044–1.384	0.010	1.071	0.776–1.477	0.678
AIS abdomen	1.041	0.767–1.414	0.796
AIS surface	0.669	0.291–1.542	0.346
AIS limb	1.057	0.869–1.287	0.579
ISS	1.069	1.045–1.094	<0.001	0.980	0.919–1.044	0.530
Epidural hematoma	1.776	1.154–2.734	0.009	1.419	0.788–2.556	0.244
Subdural hematoma	0.791	0.567–1.103	0.166
Subarachnoid hemorrhage	1.204	0.859–1.687	0.282
Intracerebral hemorrhage	1.317	0.871–1.992	0.192
White blood cell	1.097	1.063–1.133	<0.001	1.077	1.039–1.117	<0.001
Platelet	1.000	0.998–1.002	0.897
Red blood cell	0.843	0.658–1.080	0.176
Red cell distribution width	1.121	1.022–1.230	0.015	1.118	0.981–1.273	0.093
Hemoglobin	0.903	0.832–0.981	0.015	0.916	0.816–1.029	0.139
Glucose	1.006	1.003–1.008	<0.001	1.002	0.999–1.005	0.239
Blood urea nitrogen	1.013	1.002–1.024	0.026	1.002	0.986–1.018	0.831
Serum creatinine	1.183	0.979–1.429	0.081
Sodium	1.020	0.983–1.059	0.302
Potassium	0.955	0.751–1.215	0.710
Phosphorus	1.011	0.833–1.228	0.909
Calcium	0.946	0.902–0.993	0.025	1.113	1.038–1.193	0.003
Magnesium	0.916	0.541–1.553	0.745
Chloride	1.048	1.016–1.082	0.003	1.025	0.983–1.067	0.245
Anion gap	1.054	1.002–1.109	0.041	1.048	0.975–1.125	0.201
Prothrombin time	1.018	0.997–1.038	0.089
International normalized ratio	1.185	1.000–1.404	0.050
Mechanical ventilation	5.768	4.053–8.208	<0.001	3.542	2.012–6.238	<0.001
Neurosurgical operation	0.992	0.676–1.457	0.969

OR, odds ratio; CI, confidence interval; SpO2, pulse oxygen saturation; GCS, Glasgow Coma Scale; AIS, Abbreviated Injury Score; ISS, Injury Severity Score. The bold value indicated p < 0.05.