Figure 2. Variance in Body Mass Index (BMI) at Various Time Points Explained by Models With Increasing Information in the Coronary Artery Risk Development in Young Adults (CARDIA) Study.

A and B, The base model included age, sex, and self-reported parental history of overweight. The polygenic risk score (PRS), fitness, and/or activity were added to the base model. In the second block, baseline BMI was added to the base model. In the third block, preceding BMI growth curve history was also added to the base model. BMI is calculated as weight in kilograms divided by height in meters squared. NA indicates not applicable.