Fig. 7From: Modeling gene-environment interactions in longitudinal family studies: a comparison of methods and their application to the association between the IGF pathway and childhood obesityDistributions of BMI and trajectories of average BMI for analyzed QNTS participants. The trajectory of average BMI at each follow-up time point based on the entire analysis sample is highlighted by the black line. Boxplots represent the quartile ranges of BMI at each follow-up time point. Outliers are denoted by black pointsBack to article page