Shock index and its variants as predictors of mortality in severe traumatic brain injury

Table 1 Characteristics of patients with severe head injury

	Survival (n = 49)		Non-survival (n = 22)		P value1
Age (years), mean ± SD	40.51	17.4	50.73	14.6	0.013
Days in MV, mean ± SD	28.76	14.6	14.36	16.8	0.001
Fasted days, mean ± SD	13.78	8.7	7.68	6.4	0.002
Days in hospital, mean ± SD	28.76	14.6	14.36	16.8	0.001
					P value2
Sex, n (%)					0.161
Male, n (%)	44	89.8%	17	77.3%
Female, n (%)	5	10.2%	5	22.7%
Injury type, n (%)					0.607
Closed	35	71.4%	17	77.3%
Open	14	28.6%	5	22.7%
Injury cause, n (%)					0.408
Fall	13	26.5%	10	45.5%
Transit accident	18	36.7%	4	18.2%
Assault	13	26.5%	6	27.3%
Gunshot	4	8.2%	1	4.5%
Other	1	2.0%	1	4.5%
Associated injuries, n (%)					0.658
None	36	73.5%	19	86.4%
Thoracic	4	8.2%	1	4.5%
Arms	1	2.0%	0	0.0%
Legs	5	10.2%	2	9.1%
Spine	3	6.1%	0	0.0%
Craniotomy procedure, n (%)					0.822
No	34	77.3%	15	68.2%
Yes	14	31.8%	7	31.8%
Body mass index (kg/cm²), n (%)					0.761
Underweight	4	8.2%	2	13.6%
Eutrophic	25	51.0%	0	54.5%
Overweight	14	28.6%	2	18.2%
Grade I Obese	6	12.2%	2	13.6%
Comorbidities, n (%)
COPD	0	0	2	9.1%	0.032
Asma	1	0.02	0	0.0%	0.513
T2DM	1	0.02	2	9.1%	0.172
SAH	4	8.2%	2	9.1%	0.897
EVA	1	0.02	1	4.5%	0.555
AD	2	4.1%	1	4.5%	0.928

¹Student’s t test.

²Pearson’s Chi-Square test.

MV: Mechanical ventilation; COPD: Chronic obstructive pulmonary disease; DM: Type 2 diabetes mellitus; SAH: Systemic arterial hypertension; EVA: Encephalic vascular accident; AD: Alzheimer's disease.