Magnesium prophylaxis v control (placebo or routine care) after cardiac surgery*
| Outcomes at 1–30 days | Number of trials (n) | Weighted event rates | RRR (95% CI) | NNT (CI) | |
|---|---|---|---|---|---|
| Magnesium prophylaxis | Control | ||||
| *Abbreviations defined in glossary; weighted event rates, RRR, NNT, and CI calculated from data in article using a random effects model. | |||||
| Supraventricular arrhythmia | 16 (2029) | 22% | 31% | 23% (7 to 37) | 12 (8 to 22) |
| Ventricular arrhythmia | 10 (1195) | 5% | 13% | 51% (13 to 73) | 13 (7 to 59) |
| Atrial fibrillation | 12 (1649) | 19% | 28% | 29% (7 to 45) | 12 (8 to 27) |
