Assessment of partial mediation of the effect of intellectual and developmental disabilities on the occurrence of labour induction
| 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 | 0.14 (0.08 to 0.20) | 0.13 (0.07 to 0.19) | 0.018 (0.015 to 0.022) | 1.018 (1.015 to 1.022) | 12.9% |
| Pregnancy complications—maternal | 0.14 (0.08 to 0.20) | 0.14 (0.08 to 0.20) | – | – | – |
| Pregnancy complications—placental | 0.14 (0.08 to 0.20) | 0.14 (0.08 to 0.20) | – | – | – |
| Pregnancy complications—fetal | 0.14 (0.08 to 0.20) | 0.14 (0.08 to 0.19) | – | – | – |
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.