Table 1: County-level Descriptive Characteristics, by Median Income Category
Variable1 Total
N = 28682
Low Income, N = 2,4682 Middle Income, N = 3832 High Income, N = 172
Average Household Size, Median (IQR) 2.50 (2.37, 2.63) 2.48 (2.35, 2.60) 2.64 (2.48, 2.79) 2.78 (2.60, 2.85)
Poverty (%), Median (IQR) 15.90 (12.18, 20.50) 17.15 (13.68, 21.30) 9.60 (7.90, 11.00) 5.60 (4.70, 7.20)
Bachelor’s Degree- 18-24 y/o (%), Median (IQR) 5.30 (3.10, 8.23) 5.00 (2.80, 7.40) 9.10 (6.30, 12.40) 18.70 (15.10, 20.60)
Employed- 16+ y/o (%), Mean (SD) 54.15 (8.32) 52.71 (7.87) 62.87 (4.87) 66.22 (4.12)
Private Health Coverage (%), Median (IQR) 65.00 (57.20, 72.10) 63.20 (56.10, 69.80) 75.80 (71.30, 80.40) 84.00 (79.60, 87.40)
Black Population (%), Median (IQR) 2.30 (0.63, 10.53) 2.21 (0.60, 11.07) 2.75 (0.90, 8.65) 3.21 (2.55, 8.46)
Median Age, Mean (SD) 40.85 (5.19) 41.14 (5.30) 39.06 (4.10) 39.66 (3.30)
1 Variables include education, employment, insurance coverage, race/ethnicity, income, demographics, and household composition.
2 Median and Interquartile Range (IQR) are provided for skewed distributions; Mean and Standard Deviation (SD) are provided for normal distributions. Income categories based on U.S. Census Bureau’s 2022 report, grouped into tertiles: Low Income (<$58,000), Middle Income ($58,000–$94,000), High Income (>$94,000).