Association between number of negative symptoms ascertained prior to 2011 and mental health hospital admission, readmission and duration of admission in 2011
| Inpatient admission (OR, 95% CI; n=7678)* | Readmission within 12 months of inpatient admission (OR, 95% CI; n=1612)* | Duration of inpatient admission (days; β-coefficient, 95% CI; n=1609)† | |
|---|---|---|---|
| Associations with 2 or more negative symptoms (binary variable) | |||
| Unadjusted | 1.47 (1.32 to 1.63) | 1.73 (1.41 to 2.12) | 23.9 (11.2 to 36.7) |
| 1. Age and sex | 1.37 (1.23 to 1.53) | 1.70 (1.38 to 2.09) | 24.1 (11.3 to 36.9) |
| 2. Model 1 plus marital status and employment | 1.27 (1.13 to 1.42) | 1.58 (1.28 to 1.96) | 20.1 (7.1 to 33.1) |
| 3. Model 2 plus delusions/hallucinations, and depression | 1.24 (1.10 to 1.39) | 1.58 (1.28 to 1.95) | 20.5 (7.6 to 33.5) |
| Associations with incremental number of negative symptoms (10-point scale ordinal variable)‡ | |||
| Unadjusted | 1.12 (1.09 to 1.15) | 1.12 (1.07 to 1.17) | 6.5 (3.5 to 9.4) |
| 1. Age and sex | 1.09 (1.06 to 1.12) | 1.11 (1.06 to 1.16) | 6.3 (3.3 to 9.2) |
| 2. Model 1 plus marital status and employment | 1.07 (1.04 to 1.10) | 1.09 (1.04 to 1.14) | 5.4 (2.4 to 8.4) |
| 3. Model 2 plus delusions/hallucinations, and depression | 1.07 (1.04 to 1.10) | 1.09 (1.04 to 1.14) | 5.6 (2.6 to 8.6) |
*Logistic regression.
†Linear regression.
‡ORs and β-coefficients are per one unit increase on the 10-point scale.