Figure 3
From: Longitudinal association of body mass index with lung function: The CARDIA Study
FEV 1 in year 0 BMI quartiles across three birth cohorts: 18–21 years, 22–26 years, and 27–30 years at baseline, based on repeated measures linear regression analysis and adjusted for race, sex, current age, smoking status at year 0, asthma status, time, physical activity score at year 0, and alcohol consumption at year 0. The slope of FEV1 across time becomes increasingly negative with increasing year 0 BMI (p trend < 0.0001).