Table 2: Weighted least squares regression models showing the impacts of the continuous socioeconomic deprivation index, urbanization level, primary medical care shortage areas, health uninsurance rate, and racial composition on county-level age-adjusted HIV/AIDS mortality rates, United States, 1992–1995 and 2003–2007 (N = 3141).

CovariateBivariate modelsMultivariate models
βt-stat.P valueAdj. βt-stat.P valueAdj.

Total US population, 2003–2007
Socioeconomic deprivation index1 <0.001 <0.00153.53
Urbanization level2 <0.001 <0.001
Health professional shortage area3 <0.001 0.014
Health uninsurance rate4 <0.001 <0.001
Percent of black population <0.001 <0.001
Total black population, 2003–2007
Socioeconomic deprivation index <0.001 <0.00117.07
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 <0.001
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Black male, 2003–2007
Socioeconomic deprivation index <0.001 <0.00124.50
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 <0.001
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Black female, 2003–2007
Socioeconomic deprivation index <0.001 0.00211.13
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 0.009
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Total US population, 1992–1995
Socioeconomic deprivation index <0.001 0.00330.85
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 <0.001
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Total black population, 1992–1995
Socioeconomic deprivation index 0.854 0.35217.61
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 <0.001
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Black male, 1992–1995
Socioeconomic deprivation index 0.631 0.26121.39
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 <0.001
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 <0.001
Black female, 1992–1995
Socioeconomic deprivation index 0.144 0.04410.58
Urbanization level <0.001 <0.001
Health professional shortage area <0.001 0.125
Health uninsurance rate <0.001 <0.001
Percent of black population <0.001 0.574

Notes: : unstandardized regression coefficient; β: standardized regression coefficient; : percentage variance explained.
β is also equal to the correlation coefficient in bivariate regression models.
1The 1990 or 2000 census socioeconomic deprivation index is a continuous variable with a mean of 100 and a standard deviation of 20. Higher index scores denote higher levels of socioeconomic position and lower levels of deprivation.
2The 2003 rural-urban continuum is used as a continuous variable, with code 1 being the most rural county and code 9 being the most urbanized county.
3A county is designated as a health professional shortage area for primary medical care services if it has a population to primary care physician ratio of at least 3,500 : 1; the reference groups are counties designated as nonshortage areas.
4The percentage of population without health insurance in 2000.