Table 3.
Logistic regression analysis of odds of 90-day readmission
| Variable | Odds ratio (95% CI) | p Value |
|---|---|---|
| Diagnosis | 0.0056 | |
| Schizophrenia (F20) | 1 | |
| Other psychotic disorders (F21–F29) | 1.00 (0.81–1.23) | |
| Hypomania/mania/bipolar disorder (F30–F31) | 1.16 (0.92–1.46) | |
| Depression (F32–F39) | 0.86 (0.67–1.09) | |
| Neurotic and anxiety disorders (F40–F49) | 0.94 (0.70–1.25) | |
| Personality disorders (F60–F69) | 1.57 (1.17–2.09) | |
| Drug & alcohol disorders (F10–F19) | 1.12 (0.87–1.43) | |
| Other primary diagnosis | 0.92 (0.66–1.27) | |
| Length of the index hospital admission | 0.0085 | |
| Zero days | 1 | |
| 1–5 days | 1.50 (1.08–2.08) | |
| 6–18 days | 1.43 (0.99–2.05) | |
| 19–47 days | 1.27 (0.89–1.81) | |
| 48 days or more | 1.11 (0.78–1.57) | |
| Number of psychiatric hospital discharges in 2 years before admission | <0.0001 | |
| None | 1 | |
| One | 1.53 (1.26–1.86) | |
| Two | 1.68 (1.24–2.27) | |
| Three or more | 3.14 (2.29–4.30) | |
| Legal status during admission | 0.0428 | |
| Informal | 1 | |
| Section 2 | 0.96 (0.81–1.14) | |
| Section 3 or Forensic | 0.75 (0.59–0.94) | |
| Admission HoNOS cognitive problems = 2, 3 or 4 | 1.27 (1.07–1.51) | 0.0069 |
| Discharge HoNOS overactive, aggressive, disruptive or agitated behaviour = 2, 3 or 4 | 1.90 (1.56–2.33) | <0.0001 |
| Discharge HoNOS hallucinations and delusions = 2, 3 or 4 | 1.53 (1.27–1.85) | <0.0001 |
Note. The baseline odds were 0.068 (95% CI 0.044–0.105), equivalent to a probability of readmission within 90 days of 6.3%.