Table A2:

Model coefficients for the high attenuation lung regressions with the following groups (grp.) with reference groups annotated with (R): age1, <30 years; age 2, 30–55 years; age 3, >55 years (R); crush area 1, <5000 cm²; crush area 2, 5000–8000 cm²; crush area 3, >8000 cm² (R); crush location 1, <90 cm; crush location 2, ≥90 cm (R). In addition, side airbag deployment (SAB), male, and rib fracture are also reference groups. These groups all have a coefficient of zero. Energy was divided by 100,000 for the analysis. Inter is the intercept.

	Crush Variable		Age		No SAB	Female	BMI	No Rib	ISS	Inter.
Model	Grp. 1	Grp.2	Grp. 1	Grp. 2
Max. Crush	0.003		−0.115	−0.084	−0.037	−0.005	0.004	−0.044	0.003	0.002
Crush Area	−0.083	−0.093	−0.082	−0.048	−0.020	−0.019	0.005	−0.021	0.004	0.101
Crush Location	0.001		−0.074	−0.043	−0.020	−0.002	0.005	−0.017	0.004	0.015
Energy	0.064		−0.093	−0.077	−0.007	−0.014	0.005	−0.041	0.003	−0.008