Witnessed arrest correlation to survival and bystander CPR
| ER survival | |||
|---|---|---|---|
| Witnessed | No | Yes | Total |
| Ļ2 Pearson correction (pā=ā0.0009); odds ratio 2.5 (0.231/0.0938) | |||
| No | 288 | 27 | 315 |
| % | (91.4) | (8.6) | (43.9) |
| Yes | 326 | 76 | 402 |
| % | (81.1) | (18.9) | (56.1) |
| Total | 618 | 103 | 717 |
| % | (85.6) | (14.4) | (100.0) |