Factors associated with length of stay and the risk of readmission in an acute psychiatric inpatient facility: a retrospective study

Figures & data

Table 1. Principal diagnosis on admission

Diagnosis	N (226)	Percent (%)
Psychosis	136	60.2
Depression: unipolar	52	23.0
Bipolar disorder	26	11.5
Anxiety disorder	7	3.1
Somatoform disorder	7	3.1
Situational crisis	26	11.5
Adjustment disorder	14	6.2
Pathological gambling	3	1.3

Patients may have more than one Axis-I disorder.

Table 2. Types of psychotic illness

Diagnosis	N (136)	Percent (60.2%)
Schizophrenia	82	36.3
Schizophreniform	2	0.9
Schizoaffective disorder	35	15.5
Delusional disorder	6	2.7
Shared psychotic disorder	1	0.4
Drug induced	7	3.1
Not otherwise specified (NOS)	3	1.3

Table 3. Drug/alcohol (D/A)-related diagnosis

Diagnosis	N (226)	Percent (%)
D/A-related disorder	133	58.8
Alcohol use disorder	92	40.7
Acute alcohol disorder	35	15.5
Poly-substance misuse	88	38.9
Amphetamine misuse	69	30.5
Amphetamine intoxication	13	5.8
Cannabis misuse	107	47.3
Cannabis intoxication/withdrawal	21	9.2

D/A related diagnoses are mutually inclusive, a patient can have multiple D/A related diagnoses.

Table 4. Results of logistic regression

Variables	P value	Exp (B)	95%CI
Non-western born	0.004	0.27	0.10–0.65
Completed high school	0.006	0.34	0.16–0.73
New accommodation	0.030	3.54	1.13–11.13
Seclusion	0.016	4.06	1.30–12.68
D/A related diagnosis	0.048	0.45	0.21–0.99
Situational crisis	0.027	0.19	0.04–0.83
Adjustment disorder	0.045	0.10	0.01–0.95
Cluster B personality disorder	0.043	0.38	0.15–0.97
Broadmeadows area	0.048	2.65	1.01–6.95
Transferred from out of area	0.044	0.20	0.04–0.96

Table 5. Results of Cox regression test

Variables	P value	Exp (B)	95%CI
Previous admission <2	0.022	0.21	0.05–0.80
MSE deterioration	0.023	3.08	1.17–8.10
Post discharge ED contact	0.000	14.05	3.26–60.68
Legal status change post discharge	0.011	0.06	0.01–0.53
Change in treating team	0.025	0.33	0.12–0.87
Risk to others on admission	0.008	5.75	1.59–20.82
Alcohol intoxication	0.041	3.29	1.05–10.32
ECT	0.001	12.85	2.99–55.19
Post discharge ISP	0.017	0.33	0.14–0.82