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. 2017 Jul 3;177(7):1003–1011. doi: 10.1001/jamainternmed.2017.0918

Table 1. Variables Included in the Regression Analysis With Summary Statistics and Bivariate Regression Results.

Variable Summary Statistics, Mean (SD) [Range] Bivariate Regression Results
Coefficient (SE) R2
Socioeconomic and race/Ethnicity factors
Population below the poverty line, % 16.3 (6.4) [3.1-62.0] −0.24 (0.005) 0.47
Median household income, log $ 10.6 (0.2) [9.8-11.6] 6.06 (0.130) 0.41
Graduates, age ≥25 y, %
High school 83.7 (7.2) [46.3-98.6] 0.20 (0.004) 0.42
College 19.2 (8.6) [4.2-72.0] 0.15 (0.004) 0.34
Unemployment rate, age ≥16 y, % 9.1 (3.2) [2.1-27.4] −0.29 (0.011) 0.18
Black population, % 9.4 (14.7) [0-85.8] −0.07 (0.002) 0.24
American Indian, Native Alaskan, and Native Hawaiian population, % 2.3 (7.9) [0-97.2] −0.06 (0.005) 0.04
Hispanic population, % 8.1 (13.1) [0-95.9] 0.02 (0.003) 0.01
Behavioral and metabolic risk factors, %
Obesity prevalence, age ≥20 y 37.0 (4.3) [18.0-52.0] −0.39 (0.006) 0.54
No leisure-time physical activity prevalence, age ≥20 y 27.0 (5.2) [11.7-47.2] −0.34 (0.005) 0.62
Cigarette smoking prevalence, age ≥18 y 24.7 (4.1) [7.7-42.1] −0.40 (0.007) 0.54
Hypertension prevalence, age ≥30 y 39.5 (3.6) [27.9-56.4] −0.49 (0.007) 0.62
Diabetes prevalence, age ≥20 y 14.0 (2.4) [8.1-25.5] −0.72 (0.011) 0.59
Health care factors
Insured population, age <65 y, % 81.7 (5.7) [57.3-96.7] 0.15 (0.007) 0.14
Quality index 70.1 (11.5) [0-100] 0.10 (0.003) 0.28
Physicians per 1000 population, No. 1.1 (1.0) [0-4.4] 0.53 (0.039) 0.06

Abbreviation: SE, standard error.