Table 2.

Univariate and multivariate cox regression analysis of time to readmission

Variables		Readmission				Readmission within a year
		Univariate analysis		Multivariate analysis		Univariate analysis		Multivariate analysis
		Hazard Ratio	P-value	Hazard Ratio	P-value	Hazard Ratio	P-value	Hazard Ratio	P-value
Age		0.79	< 0.001	0.78	< 0.001	0.85	< 0.001	0.82	< 0.001
Sex	Male	1.03	0.723			1.04	0.631
	Transgender	53.05	< 0.001			53.49	< 0.001
Race	Hispanic	1.05	0.524			1.05	0.54
	White	0.99	0.978			1.05	0.825
	Asian/Pacfc Islandr	1.09	0.753			1.15	0.613
	American Indian	4.68	0.124			4.68	0.124
	Other	1.27	0.561			0.87	0.787
Number of Traumas	1–3	0.95	0.552			0.97	0.754
	4–5	0.92	0.44			0.96	0.747
	6 +	1.01	0.917			1.06	0.7
Accident disaster		0.94	0.417			0.94	0.441
Physical abuse of assault		0.92	0.275			0.92	0.258
Assault witnessing		1.000	0.977			1.05	0.53
Community violence		1.02	0.79			1.04	0.678
Sexual abuse or assault		1.27	0.099	1.37	0.032	1.31	0.07
Polyvictimization		0.98	0.826			1.000	0.953
Any PTSD		1.03	0.747			1.1	0.325
Full PTSD		0.98	0.875			1.04	0.768
Partial PTSD		1.09	0.542			1.15	0.292
UCLA PTSD Score		1.000	0.655			1.000	0.942
Depression	Moderate	1.02	0.885			1.02	0.851
	Severe	0.84	0.328			0.89	0.518
Substance Abuse		1.11	0.161			1.13	0.09	1.22	0.007
Any Comorbidity		0.98	0.872

Factors with P-value less than 0.1 in the univariate analysis were entered into the multivariate analysis. After variable selection, P-values in the multivariate analysis are less than 0.05