Fig. 1

The latent class growth model of BMI trajectories in the PLCO study. A BMI changes for each participant in each trajectory group across three analysed age points (ages of 20 years, 50 years, and baseline). B Each trajectory was calculated at any of the three analysed age points (ages of 20 years, 50 years, and baseline). HR and 95% CI were estimated by Cox proportional hazards regression model with the adjustment for age, sex, race, family history of lung cancer, education, smoking, personal history of diabetes, current marital status, and study centre