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Results in patients with out of hospital cardiac arrest
| Number of patients in intervention group | Physicians increase survival | Not significant | Physicians decrease survival |
| <100 | Dickinson et al., 1997 (n = 9) | (Mitchell et al., 1997 (n < 100)) | |
| Soo et al., 1999 (n = 38 et 37) | |||
| Sipria et al., 2000 (n = 70) | |||
| Frandsen et al., 1991 (n = 85) | |||
| 100–1.000 | |||
| >1.000 |
For studies with subgroup analysis only subgroup results are displayed
