Table 7 Pooled standardized mortality ratios (SMRs) across the included studies, grouped by time periods examined after release
Time after release | Number of studies | Pooled measure (95%CI) | Heterogeneity I2 |
|---|---|---|---|
Standardised mortality ratios | |||
 Any time | 5 | 6.99 (4.13–11.83) | 99.14% |
 First 2 weeks | 4 | 27.07 (13.32–55.02) | 93.99% |
 First 3–4 weeks | 3 | 10.17 (3.74–27.66) | 83.83% |
 First year | 3 | 15.58 (7.05–34.40) | 97.99% |