Meta-regression analysis for each outcome
| Outcome | Intercept* | Slope* |
| Mortality within 90 days | −0.42 (0.19) | 0.01 (0.004) |
| ICU mortality | 0.31 (0.35) | −0.004 (0.01) |
| Hospital mortality | 0.31 (0.34) | −0.01 (0.01) |
| Length of ICU stay | −2.89 (1.90) | 0.03 (0.04) |
| Length of hospital stay | −1.74 (4.13) | 0.034 (0.08) |
*Presented as point estimate of coefficient and SE.
ICU, intensive care unit.