Table 2. Estimates of Pathways in the Association Between Socioeconomic Position (Medical Aid vs National Health Insurance Quartiles 1-4) and Survival to Discharge Among the Total Study Population.
| Pathway | Effect estimate (95% CI) | Mediation proportion (95% CI), % |
|---|---|---|
| Total | −0.032 (−0.036 to −0.027) | NA |
| Witnessed status | −0.005 (−0.006 to −0.004) | 15.1 (11.8 to 18.4) |
| Bystander CPR | −0.002 (−0.002 to −0.001) | 4.8 (3.5 to 6.0) |
| Bystander CPR but not through witnessed statusa | −0.001 (−0.002 to −0.001) | 4.4 (3.2 to 5.6) |
| Initial rhythm | −0.013 (−0.015 to −0.012) | 41.8 (35.4 to 48.1) |
| Initial rhythm but not through witnessed status or bystander CPRa | −0.011 (−0.012 to −0.009) | 34.2 (28.4 to 40.0) |
| ED level | −0.003 (−0.003 to −0.002) | 9.4 (7.4 to 11.4) |
| Direct | −0.012 (−0.016 to −0.008) | 36.9 (28.1 to 45.7) |
Abbreviations: CPR, cardiopulmonary resuscitation; ED, emergency department; NA, not applicable
a
The proportion mediated through a mediator but not through its intermediate confounders (variable that is affected by the exposure, which in turn affects the outcome and mediator) is assessed.