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Individual-level (n ≈ 3,471,000)
Census tract-level (n = 2,830,000)
County-level (n = 2,854,000)
Proportion
SD
Proportion compared to the US median
SD
Proportion compared to the US median
SD
Household income
Above US median
0.47
0.50
0.51
0.50
0.49
0.50
Poverty level
≤ 100% FPL
0.10
0.30
0.49
0.50
0.46
0.50
Education
Has high school degreea
0.86
0.35
0.50
0.50
0.52
0.50
Has college degreeb
0.26
0.44
0.47
0.50
0.48
0.50
Employment/occupation
Is unemployedc
0.04
0.18
0.49
0.50
0.48
0.50
Employed in blue-collar industryd
0.37
0.48
0.52
0.50
0.53
0.50
Other characteristics
Owns home
0.74
0.44
0.55
0.50
0.53
0.50
Foreign born
0.13
0.33
0.46
0.50
0.46
0.50
Individual-level SES categories are binary variables based on individual-level values, while census tract- and county-level SES categories reflect whether the areas were at or below versus above the US median for that characteristic. For household income, education, and owns home, having a value of 1 was considered low risk for health outcomes, while having a value of 0 was considered high risk; in contrast, for poverty, employment/occupation, and foreign born, having a value of 1 was considered high risk, while having a value of 0 was considered low risk
SD standard deviation, US United States, FPL federal poverty level
a Having a high school degree was measured among participants who were 18+ years old
b Having a college degree was measured among participants who were 25+ years old
c Unemployment was measured among participants who reported being in the workforce (e.g., excluding retirees)
d Employment in a blue-collar industry was measured among participants who reported being employed (i.e., excluding unemployed participants)