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Table 2 Decomposition of effects of maternal obesity on child obesity, with gestational weight gain as the mediator

From: Overall gestational weight gain mediates the relationship between maternal and child obesity

Decomposition of effects

Estimatea

95% Confidence Interval

CDE

0.322

(0.207, 0.439)

NDE

0.235

(0.157, 0.313)

NIE

0.020

(0.003, 0.042)

Total effect

0.246

(0.165, 0.329)

Proportion mediated (%)

8.13%

(1.82, 12.8%)

  1. CDE Controlled direct effect, NDE Natural direct effect, NIE natural indirect effect
  2. Footnotes: a The estimated average difference in child BMI z-score adjusted for maternal race, education (SES), gestational diabetes, and smoking status during pregnancy
  3. Total effect = NDE + NIE; Proportion Mediated = NIE/Total Effect