Fully-adjusted estimated coefficients and 95% confidence interval for the association between covariates and size and velocity parameters on the pooled GXXI & NINFEA datasets.

aModel fitted on the sample of data with no missing values for the following maternal variables: height, age, parity, educational level, pre-pregnancy BMI and smoking during pregnancy
bBackground variables are mutually adjusted and further adjusted for gender and gestational age
cGXXI: Low = ≤9 years, Medium = ≤12 years, High = Degree or higher; NINFEA: Low =  ≤Secondary school, Medium = High school, High = Degree or higher
dIntermediate variables are mutually adjusted and further adjusted for background variables, gender and gestational age
eModel fitted on the sample of data with no missing values for the maternal variables: height, age, parity, educational level, pre-pregnancy BMI, smoking during pregnancy, gestational diabetes and gestational hypertension