Demographic Information and Physical Activity
Demographic information, including age, sex, race/ethnicity,
poverty income ratio (PIR), physical activity, smoking status, and alcohol consumption was collected during household interviews. For race/ethnicity, all individuals were included in the analyses, but because NHANES only has nationally representative data for non-Hispanic white, non-Hispanic
black, and Mexican Americans before 2007, these classifica-
tions were the ones used in this study