Table 4. LOS poisson reduced regression Model.

	B	Std. Error	95% Wald Confidence Interval		Hypothesis Test			Exp(B)	95% Wald Confidence Interval for Exp(B)
			Lower	Upper	Wald Chi-Square	df	Sig.		Lower	Upper
(Intercept)	3.261	0.2025	2.865	3.658	259.374	1	0.000	26.088	17.541	38.799
[Neurological Level = 1]	0.958	0.2082	0.550	1.366	21.162	1	0.000	2.606	1.733	3.918
[Neurological Level = 2]	0.009	0.2080	-0.399	0.417	0.002	1	0.966	1.009	0.671	1.517
[Neurological Level = 3]	0.017	0.2074	-0.389	0.424	0.007	1	0.934	1.017	0.677	1.528
[Neurological Level = 4]	0.049	0.2043	-0.351	0.449	0.058	1	0.810	1.050	0.704	1.567
[Neurological Level = 5]	0.217	0.2029	-0.181	0.615	1.145	1	0.284	1.243	0.835	1.850
[Neurological Level = 6]	-0.280	0.2093	-0.690	0.130	1.787	1	0.181	0.756	0.502	1.139
[Neurological Level = 7]	0a							1
[Classification of injury (ASIA) at admission = 1]	0.168	0.0464	0.077	0.259	13.170	1	0.000	1.183	1.080	1.296
[Classification of injury (ASIA) at admission = 2]	0.164	0.0533	0.060	0.269	9.490	1	0.002	1.179	1.062	1.308
[Classification of injury (ASIA) at admission = 3]	-0.003	0.0505	-0.102	0.096	0.004	1	0.947	0.997	0.903	1.100
[Classification of injury (ASIA) at admission = 4]	0a							1
[Spinal Surgery = 0]	-0.241	0.0647	-0.367	-0.114	13.820	1	0.000	0.786	0.693	0.892
[Spinal Surgery = 1]	0a							1
[TSCIvsNTSCI = 1]	-0.271	0.1158	-0.498	-0.044	5.475	1	0.019	0.763	0.608	0.957
[TSCIvsNTSCI = 2]	0a							1
[Cause of Injury = 2]	0.165	0.1613	-0.151	0.481	1.046	1	0.306	1.179	0.860	1.618
[Cause of Injury = 3]	0.549	0.1177	0.318	0.780	21.763	1	0.000	1.732	1.375	2.181
[Cause of Injury = 4]	1.100	0.1242	0.857	1.344	78.505	1	0.000	3.005	2.356	3.833
[Cause of Injury = 5]	0a							1
[Cause of Injury = 6]	0a							1
[Retroviral Status = 0]	-1.992	0.2954	-2.570	-1.413	45.460	1	0.000	0.136	0.077	0.244
[Retroviral Status = 1]	0.146	0.0385	0.071	0.222	14.443	1	0.000	1.158	1.073	1.248