Table 2.

Subgroup analysis depicting the adjusted risk ratio (RR) for the association between BMI and HGRT by mechanism of injury

BMI category	Mechanism of injury
	Overall		Blunt		Penetrating
	RR (95% CI)	p	RR (95% CI)	p	RR (95% CI)	p
Underweight	1.02 (0.93–1.11)	0.714	1.01 (0.92–1.12)	0.7	0.99 (0.85–1.14)	0.915
Normal weight	Reference		Reference		Reference
Overweight	0.94 (0.9–0.97)	<0.001	0.91 (0.88–0.95)	<0.001	0.99 (0.94–1.05)	0.989
Class I obesity	0.86 (0.82–0.89)	<0.001	0.82 (0.78–0.87)	<0.001	0.97 (0.90–1.04)	0.498
Class II obesity	0.87 (0.81–0.92)	<0.001	0.82 (0.75–0.89)	<0.001	1.04 (0.94–1.14)	0.387
Class III obesity	0.75 (0.69–0.82)	<0.001	0.71 (0.64–0.78)	<0.001	0.91 (0.81–1.04)	0.184