Table 2.

Linear mixed-effects regression model for scene time.

Variable	Variance components estimate (minutes)	P-value
Fixed effects
Base point (Intercept)	8.6
Age type
Adult	2.7 (1.7 to 3.7)	<.0001
Gender
Female	0.9 (0.4 to 1.5)	0.0016
Race/Ethnicity
African American	−0.7 (−1.4 to 0.04)	0.06
Other	0.01 (−0.9 to 0.9)	1.0
White	Reference
Type of trauma
Blunt	5.5 (4.7 to 6.3)	<.0001
Urbanicity
Rural	1.8 (−0.3 to 3.9)	0.09
Blunt *rural	−2.8 (−4.8 to −0.9)	0.005
Random effects
County
County A	−1.5 (−3.8 to 0.8)	0.21
County B	−2.4 (−4.7 to −0.2)	0.04
County C	−0.5 (−2.8 to 1.8)	0.7
County D	0.6 (−1.6 to 2.9)	0.6
County E	3.8 (1.4 to 6.1)	0.002