Table 1.

Multivariate analysis of patient characteristics and disposition

Variable	Overall P-value	Item	Odds ratioa	95% CI	P-value
Sex	<0.001	Female	1 (reference)	–	–
		Male	0.646	0.557–0.749	<0.001
Day of week	0.869	Weekday	1 (reference)	–	–
		Saturday or Sunday	0.974	0.805–1.180	0.790
Patient residence	0.022	Private residence	1 (reference)	–	–
		Blank/unknown	0.760	0.386–1.499	0.428
		Homeless/homeless shelter	0.338	0.131–0.873	0.025
		Nursing home	0.494	0.262–0.930	0.029
		Other	1.116	0.533–2.338	0.771
Race/ethnicity	0.003	Non-Hispanic White	1 (reference)	–	–
		Hispanic	1.155	0.866–1.540	0.326
		Non-Hispanic Black	1.546	1.204–1.987	0.001
		Non-Hispanic Other	0.969	0.643–1.460	0.881
Insurance	0.138	Private insurance	1 (reference)	–	–
		All sources of payment are blank/unknown	0.763	0.514–1.132	0.178
		Medicaid or CHIP or other state-based program	0.877	0.689–1.117	0.288
		Medicare	0.803	0.605–1.064	0.126
		Worker’s comp/self-pay/no charge/charity/other	1.270	0.896–1.800	0.178
Computed tomography scan	<0.001	No	1 (reference)	–	–
		Yes	0.516	0.438–0.609	<0.001
Magnetic resonance imaging	<0.001	No	1 (reference)	–	–
		Yes	0.154	0.063–0.374	<0.001
Ultrasound	<0.001	No	1 (reference)	–	–
		Yes	0.524	0.406–0.675	<0.001
Other imaging	0.096	No	1 (reference)	–	–
		Yes	0.548	0.269–1.113	0.096
Age	<0.001	Age	0.972	0.966–0.977	<0.001

CHIP, Children’s Health Insurance Program; CI, confidence interval.

^aAn odds ratio of <1 with a significant P-value indicates a statistical association of being admitted to the hospital; an odds ratio of >1 with a significant P-value indicates a statistical association of being discharged from the emergency room.