Associations of homelessness and residential mobility with length of stay after acute psychiatric admission

Table 2 Linear regression model

Variable		exp β (95% CI)	incremental R²	P
Residential mobility		1.99 (1.80,2.20)	0.028	<0.001
Homelessness		1.45 (1.32,1.60)	0.009	<0.001
Legal status¹			0.082	<0.001
	Informal	1
	Section 2	1.86 (1.71,2.02)
	Section 3 or Forensic	3.06 (2.78,3.38)
Age / years ²			0.003	<0.001
	16-25	1
	26-35	1.00 (1.00,1.00)
	36-45	1.02 (1.01,1.03)
	46-55	1.08 (1.04,1.12)
	56-65	1.20 (1.10,1.30)
Diagnosis			0.029	<0.001
	Drug and alcohol	1
	Non-psychotic	1.35 (1.18,1.53)
	Other psychotic	1.88 (1.65,2.15)
	Schizophrenia	2.33 (2.03,2.67)
Longest admission in preceding 2 years ³	None	1	0.011	<0.001
	1-16 days	0.98 (0.89,1.07)
	17-39 days	1.18 (1.10,1.26)
	40-71 days	1.31 (1.22,1.41)
	90+ days	1.53 (1.39,1.68)
HoNOS #2	Mild to very severe	0.79 (0.72,0.87)	0.004	<0.001
HoNOS #4	Mild to very severe	1.14 (1.03,1.27)	0.002	0.015
HoNOS #5	Mild to very severe	1.16 (1.05,1.29)	0.002	0.005
HoNOS #6	Mild to very severe	1.10 (1.01,1.20)	0.001	0.023
HoNOS #7	Mild to very severe	1.11 (1.01,1.21)	0.001	0.028
HoNOS #10	Mild to very severe	1.38 (1.27,1.49)	0.011	<0.001

Note. N = 4478 after subtraction of seven observations with outlying values for LOS. Overall r2 was 0.368. ¹ Legal status was defined as the most restrictive section of the Mental Health Act in force during the first week of the admission. Those detained only under Section 136, Section 5(2) or Section 5(4) were treated as informal. ² Exponentiated coefficients for age-band are category-based estimates derived from the full regression model. Reference points for age used to generate these estimates were 20, 30, 40, 50 and 60 years. ³ Reference points for the category-based estimates for the effect of length of the longest previous admission were the median values of log previous LOS in each band.