Table 3. Linear regression estimates for the association of maternal GWG with children’s BMI at age 3–6 years according to the pre-pregnancy BMI category.

Pre-pregnancy BMI groups	Unadjusted coefficient (95% CI)	Adjusteda coefficient (95% CI)
All mothers	0.009 (0.007, 0.010)	0.017 (0.015, 0.018)
Underweight mothers	0.014 (0.010, 0.018)	0.022 (0.018, 0.026)
Normal weight mothers	0.011 (0.009, 0.013)	0.019 (0.017, 0.021)
Overweight/Obese mothers	0.028 (0.017, 0.039)	0.034 (0.023, 0.045)

BMI, body mass index; CI, confidence interval; GWG, gestational weight gain.

^aAdjusted for child sex, age, child birth weight, maternal age, education, occupation, gravidity, weeks of gestation, and year of registry.