Assessment of partial mediation of the effect of intellectual and developmental disabilities on the occurrence of caesarean section
| Mediators | Values on the logarithmic scale | Indirect effect aRR (95% CI) | Percentage of effect explained | ||
|---|---|---|---|---|---|
| Total effect aβ (95% CI) | Direct effect aβ (95% CI) | Indirect effect* aβ (95% CI) | |||
| Pre-pregnancy health conditions | 0.09 (0.03 to 0.15) | 0.07 (0.00 to 0.13) | 0.025 (0.022 to 0.028) | 1.025 (1.022 to 1.029) | 27.8% |
| Pregnancy complications—maternal | 0.09 (0.03 to 0.15) | 0.08 (0.02 to 0.14) | 0.012 (0.007 to 0.018) | 1.012 (1.007 to 1.018) | 13.3% |
| Pregnancy complications—placental | 0.09 (0.03 to 0.15) | 0.09 (0.03 to 0.15) | – | – | – |
| Pregnancy complications—fetal | 0.09 (0.03 to 0.15) | 0.10 (0.03 to 0.16) | – | – | – |
Mediation models control for maternal age, parity, neighbourhood income quintile, and rural residence.
*Indirect effect=total effect—direct effect; describes the magnitude of the effect of intellectual and developmental disabilities through the mediator.
–: No indirect effect.
aRR, adjusted relative risks.