TABLE 4.

Factors Affecting ED and Non-ED Charges for 1 Year

Linear Regression for Charges	Coefficient, US $	95% Confidence Interval	p
Total downstream charges
TRS	2,839	−18,689 to 24,367	0.80
Age	−276	−793 to 241	0.30
ISS	3,402	2,267–4,536	<0.0001
Hospital length of stay	4,039	2,868–5,209	<0.0001
Female	−7,344	−27,339 to 12,650	0.47
Penetrating mechanism	969	−22,651 to 54,589	0.94
ED
TRS	−1,243	−2,473 to −13	0.048*
Age	−21	−50 to 9	0.16
ISS	7	−57 to 72	0.82
Hospital length of stay	9	−58 to 76	0.78
Female	−654	−1,797 to 88	0.26
Penetrating mechanism	70	−1,280 to 1,249	0.92
Non-ED (outpatient and admission)
TRS	4,082	−17,125 to 25,290	0.70
Age	−254	−764 to 254	0.33
ISS	3,395	2,277–4,512	<0.0001
Hospital length of stay	4,029	2,876–5,182	<0.0001
Female	−6,690	−26,388 to 13,007	0.51
Penetrating mechanism	899	−22,370 to 24,168	0.94

Charges are presented in US $.

^*Linear regression.