Variables | Number of studies resulted significant/Number of studies analysing the variable | Main significant resultsa (bivariate) | Main significant resultsa (multivariate) |
---|---|---|---|
Previous admissions | 32/37 | Previous admissions risk factor (23)b | Previous admissions risk factor (21) |
Duration of illness | 2/4 | Higher length of illness risk factor (2) | No significant results |
Age at onset | 2/6 | Mixed direction (2) | No significant results |
Whether index admission corresponded to first onset/episode | 1/2 | First onset protective factor (1) | No significant results |
Number of previous hospital days/average previous LoS | 2/4 | Number of previous hospital days risk factor (2) | Number of previous hospital days risk factor (1) |
Previous use of health services | 8/10 | Increasing risk with service use (3) | Increasing risk with service use (8) |