Logistic regression analysis of possible factors contributing to the primary end point: (ROSC at the scene or in A&E)
| Odds ratio (95% CI) | p | |
|---|---|---|
| Age | 0.56 | |
| An increase of 1 year | 1.01 (0.97 to 1.07) | |
| Witnessed arrest | 0.87 | |
| Witnessed | 1.00 | |
| Unwitnessed | 0.56 (0.06 to 4.97) | |
| Unknown | 0.93 (0.09 to 9.77) | |
| Bystander CPR | 0.23 | |
| Good | 1.00 | |
| Poor/none | 0.48 (0.14 to 1.61) | |
| Unknown | 0.56 (0.23 to 1.72) | |
| Response time | 0.10 | |
| An increase of 1 minute | 0.89 (0.77 to 1.02) | |
| Received magnesium | 0.37 | |
| Placebo | 1.00 | |
| Magnesium | 1.69 (0.54 to 5.30) | |
| Amount of magnesium given | 0.51 | |
| 2 g (8 mmol) | 1.00 | |
| 4 g (16 mmol) | 1.74 (0.37 to 8.14) | |
| Placebo | 0.77 (0.19 to 3.11) |