Table 3

Logistic regression analysis of the risk of having polytrauma: patients were defined as having sustained polytrauma if they had at least one additional injury of AIS ≥3 outside of the chest region, AUROC (area under the receiver operating curve) = 0.712 (95% CI 0.701 to 0.722)

Covariates		Unadjusted ORs				Adjusted ORs
		OR	95% CI for OR		p Value	OR	95% CI for OR		p Value
		OR	Upper	Lower	p Value	OR	Upper	Lower	p Value
Age (years)	16–44	Reference
	45–54	0.56	0.53	0.68	<0.001	0.69	0.61	0.79	<0.001
	55–64	0.48	0.42	0.55	<0.001	0.61	0.53	0.70	<0.001
	65–74	0.44	0.38	0.50	<0.001	0.60	0.52	0.69	<0.001
	>75	0.31	0.28	0.35	<0.001	0.59	0.52	0.68	<0.001
Gender	Male	Reference
Gender	Female	0.86	0.79	0.94	<0.001	1.18	1.07	1.30	<0.001
MOI	Fall <2 m	Reference
	Fall >2 m	4.33	3.79	4.95	<0.001	3.73	3.27	4.27	<0.001
	RTC	5.51	4.88	6.21	<0.001	4.08	3.60	4.64	<0.001
	Shooting/stabbing	2.59	1.69	3.97	<0.001	1.95	1.26	3.02	p=0.003
	Other		2.03	2.99	<0.001	1.95	1.59	2.39	<0.001
Type of rib fracture	Other ribs	Reference
Type of rib fracture	First rib	2.94	2.64	3.28	<0.001	2.01	1.80	2.25	<0.001

AIS, Abbreviated Injury Score; MOI, mechanism of injury; RTC, road traffic collision.