Table 1. Distribution of Individual and County-Level Variables by Quintile of Primary Care Physician Supply
Quintile I (Highest PCP Supply)Quintile IIQuintile IIIQuintile IVQuintile V (Lowest PCP Supply)Mean
Individual variables
    Obesity prevalence*25.827.126.828.230.827.7
    Demographic
        Mean age (years)47.547.747.647.647.547.6
        Is a parent33.936.236.838.638.636.8
        Is insured84.885.083.080.379.482.5
    Education
        <High school education12.111.513.316.116.914
        High school graduate25.527.228.129.432.428.5
        Some college30.131.030.931.031.230.8
        College/postgraduate32.330.227.523.519.426.6
    Race/ethnicity
        White66.467.063.562.468.765.6
        Black13.414.312.410.69.512.0
        Hispanic13.18.415.719.816.714.8
        Other7.110.28.47.15.17.6
    Income ($/year)
        <15,0005.14.65.15.86.15.4
        <20,0007.46.87.37.38.17.4
        <25,0007.97.87.58.99.18.2
        <35,0009.29.29.69.710.19.6
        <50,00012.212.512.412.413.012.5
        <75,00013.314.113.013.314.013.5
        ≥75,00027.528.827.524.321.525.9
    Smoking history
        Current smoker18.018.417.618.420.918.6
        Former smoker25.325.225.224.824.425.0
        Never smoker55.155.055.955.553.455.0
County-level variables
    Black category
        Low11.78.86.07.216.610.1
        Low/medium15.616.518.813.917.716.5
        Medium17.913.425.227.625.421.9
        Medium/high24.832.123.930.918.726.1
        High30.029.326.220.421.725.5
    In a metropolitan area85.691.390.081.268.983.4
    Poverty
        Low17.327.922.520.720.621.8
        Low/mid30.022.422.714.220.922.0
        Mid/high32.627.130.244.523.531.6
        High20.122.524.620.635.124.6
  • Data are percentages unless otherwise indicated (N = 392,535 individuals).

  • * Obesity is defined as a body mass index ≥30 kg/m2.

  • Data sources: 2012 Behavioral Risk Factor Surveillance System, 2012 AMA Masterfile, 2010 Census estimates, 2003 rural-urban continuum codes, 2012–2013 area resource files.