These lines are the output of a statistical model, based on cohort- and age-associated changes in BMI observed in NCHS data collected between 1959 and 2006. I edited the post to make that clearer.
These lines are the output of a statistical model, based on cohort- and age-associated changes in BMI observed in NCHS data collected between 1959 and 2006. I edited the post to make that clearer.