Fig. 3
From: Impact of BMI and smoking in adolescence and at the start of pregnancy on birth weight
Impact of changes in BMI status from 19 years of age to the start of the first pregnancy on birth weight, results from a multivariable regression model (n = 982)
*Beta (95 %CI) adjusted for maternal birth year, age at start of pregnancy and smoking, gestational week and sex of child
The group with normal weight (BMI 18.0-24.9 kg/m2) at both 19 years of age and at start of pregnancy is used as reference
nw – normal weight, ow/ob – overweight or obesity, uw – underweight, y – years