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. 2020 Sep 9;15(9):e0238577. doi: 10.1371/journal.pone.0238577

Table 1. Characteristics of US adults participating in the 2011 Behavioral Risk Factor Surveillance System (BRFSS) (n = 270,612) and US states (50 states and the District of Columbia).

Unweighted n Weighted
Individual Level Characteristics percentage
Sex    
    Male 104,849 39.7
    Female 165,763 60.3
Age, years
    18–24 4,358 2.5
    25–34 14,520 5.5
    35–44 29,716 11.8
    45–54 48,481 20.3
    55–64 70,275 25.9
    ≥65 103,262 34.0
Racial Background
    White 223,778 78.8
    African American 21,083 8.4
    Native 4,092 0.8
    Asian 3,901 2.2
    Hispanic 12,017 7.9
    Other 5,741 1.9
Household Income
    Less than 15,000 28,820 9.4
    15,000 to 25,000 46,681 15.5
    25,000 to 35,000 31,149 10.4
    35,000 to 50,000 40,390 14.1
    Greater than 50,000 123,572 50.6
Education
    Less than High School 18,821 7.7
    High School 75,958 26.2
    Some College 73,392 26.2
    College 102,441 39.9
Marital Status
    Couple 156,144 67.1
    Single 114,468 32.9
Setting
    Urban 132,808 62.8
    Suburban 41,025 17.3
    Rural 96,779 19.9
State Level Characteristics (n = 51) Mean (SD) Median Interquartile Range Range
Gini Coefficient 0.45 (0.02) 0.45 0.028 0.419–0.529
State Median Income, USD 51,189 (8,524) 49,687 12210 37,838–70,976
Proportion of Black 12.1 (11.1) 8.7 13.3 0.8–52.2
Proportion of Poor 14.8 (3.2) 14.6 4.8 8.3–22.4
State Population 6,053,834 (6,823,984) 4,339,367 5,156,958 563,626–37,253,956