Trauma center vs. nearest non-trauma center: direct transport or bypass approach for out-of-hospital traumatic cardiac arrest

Table 5 Correlations of different covariates with 30-day survival

Variables	Univariable		Multivariable
Variables	OR (95% CI)	p-value	aOR (95% CI)	p-value
Group
Non-TC	ref		ref
Cross-region TC	4.86 (1.35—17.53)	0.016	4.56 (1.24—16.76)	0.022
TC	8.25 (2.27—30.03)	0.001	7.93 (2.13—29.52)	0.002
Age	0.99 (0.97—1.02)	0.555
Sex (Male vs. Female)	1.58 (0.50—4.98)	0.431
Mechanism (Blunt vs. Others)	0.22 (0.06—0.82)	0.024	0.31 (0.08—0.79)	0.027
Scene time (min)	1.02 (1.00—1.05)	0.106	1.03 (0.99—1.06)	0.107
Transport time (min)	1.00 (0.91—1.10)	0.939
Hospital distance (per 100 m)	1.01 (1.00—1.02)	0.085
Distance ratio^(a)	0.98 (0.88—1.10)	0.790
Bystander CPR/AED (Y vs. N)	1.02 (0.32—3.22)	0.970
Rhythm (Shockable vs. non-shockable)	0.00 (0.00—+ inf)	0.999
Prehospital airway management
BVM	ref
LMA/Intubation	0.94 (0.12—7.28)	0.949

Abbreviations: TC, Trauma Center; CPR, Cardiopulmonary Resuscitation; AED, Automated External Defibrillator; BVM, Bag-Valve-Mask; LMA, Laryngeal Mask Airway; ROSC, Return of Spontaneous Circulation; ICU, Intensive Care Unit; CPC, Cerebral Performance Category; aOR, adjusted odds ratio. ^(a)Ratio of the distance of a TC to that of the nearest hospital. Significant values (p < 0.05) are boldfaced

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