Table 4.

Final Cox proportional hazards model for predicting mortality after SCI.

Variable
	Adjusted Model [a]		Final Model*
	HR	p-value	HR [b]	95% CI		p-value	Std HR [c]
Injury Classification
C1–C4, non-ambulatory	NA		3.41	1.62	7.18	0.001	--
C5–C8, non-ambulatory	NA		2.22	1.08	4.54	0.03	--
Non-cervical, non-ambulatory	NA		2.05	1.01	4.18	0.05	--
Cervical, ambulatory	NA		1.03	0.43	2.47	0.94	--
Non-cervical, ambulatory (referent)			1.00	1.00	--	--	--
Biographic
White	NA		1.13	0.79	1.61	0.50	--
Men	NA		1.18	0.82	1.69	0.37	--
Age at injury	NA		1.06	1.05	1.07	<.0001	2.20
Years since injury	NA		1.05	1.03	1.07	<.0001	1.38
Psychologic Factors
Sensation Seeking	1.12	<.0001	--	--	--	--	--
Neuroticism-Anxiety	1.05	0.10	--	--	--	--	--
Purpose in Life	0.99	<.0001	--	--	--	--	--
Environmental Factors
Low income (<$20,000)	1.93	<.0001	1.41	1.01	1.97	0.04	--
Social support	0.95	0.003	--	--	--	--	--
Social upset	1.02	0.22	--	--	--	--	--
Behavioral Factors
Prescription medication use	1.10	<.0001	1.06	1.02	1.11	0.004	1.23
Number of binge drinking days	1.04	0.005	1.04	1.01	1.07	0.02	1.15
Out-of-bed hours	0.92	<.0001	--	--	--	--	--
Smoking composite score	1.19	<.0001	--	--	--	--	--
Health Factors
Days in the hospital	1.03	<.0001	1.02	1.00	1.03	0.03	1.16
Number of infection symptoms	1.03	<.0001	--	--	--	--	--
Fracture/amputation	3.69	<.0001	2.89	1.57	5.29	0.0006	--
Surgeries to repair ulcers	1.20	<.0001	1.13	1.06	1.21	0.0003	1.21
Probable major depression	2.21	<.0001	1.78	1.30	2.45	0.0003	--

^*179 deaths over 1209 subjects in the final model

^[a]Estimated HR for variables separately adjusted for injury and biographic variables only

^[b]Hazard ratios are adjusted for all variables that have estimates provided.

^[c]The standardized HR are reported for 1 Std change in continuous variables

-- Variable not significant and removed from the model