Table 2.

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

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%)

CDE Controlled direct effect, NDE Natural direct effect, NIE natural indirect effect

Footnotes: ^a The estimated average difference in child BMI z-score adjusted for maternal race, education (SES), gestational diabetes, and smoking status during pregnancy

Total effect = NDE + NIE; Proportion Mediated = NIE/Total Effect