“…Self-reported sociodemographic characteristics included age, sex (male, female), race/ethnicity (non-Hispanic white, Mexican American, other Hispanic, non-Hispanic black, other race), household income (< $25 000, $25 000–$45 000, >$45 000–$75 000, >$75 000), education level (some high school or less, high school graduate, some college, college graduate or above), work status (currently working or not) and occupational PA as control variables. These covariates were selected because they were hypothesised to be associated with both the exposure and outcome 7 9 28 and available within the NHANES dataset.…”