Table 1. Sensitivity analysis.
| Outcome | Number of RCTs | Number of patients | MD or RR | 95% CI | p-value | I2 | Model |
|---|---|---|---|---|---|---|---|
| One-year mortality | 4 | 5539 | 0.92 | 0.68–1.25 | 0.61 | 0% | Fix |
| Length of stay in ICU | 32 | 7345 | -0.01 h | -0.04–0.01 h | 0.38 | 36% | Fix |
| Length of stay in hospital | 29 | 7535 | -0.16 d | -0.28– -0.04 d | 0.008 | 26% | Fix |
| Postoperative cognitive impairment | 6 | 5565 | 1.37 | 0.94–1.98 | 0.1 | 36% | Fix |
RCTs, randomized controlled trials; MD, mean difference; RR, relative risk; CI, confidence interval; I2, statistical heterogeneity; ICU, intensive care unit; h, hour; d, day.