Table 3. Descriptive statistics of county-level variables.
| Predictors | 25th percentile | Median | 75th percentile | Interquartile Range (IQR) |
|---|---|---|---|---|
| Demographic characteristics | ||||
| Population size | ||||
| 2010 | 27282 | 57499 | 133577 | 106295 |
| 2014 | 27003 | 58048 | 141594 | 114590 |
| 2018 | 27259 | 59158 | 151246 | 123987 |
| Blacks among persons newly diagnosed with HIV (%) | ||||
| 2010 | 66.67 | 82.58 | 100.00 | 0.33 |
| 2014 | 50.54 | 66.67 | 88.89 | 0.38 |
| 2018 | 50.61 | 75.00 | 85.58 | 0.35 |
| Male among persons newly diagnosed with HIV (%) | ||||
| 2010 | 60.00 | 76.51 | 87.96 | 0.28 |
| 2014 | 75.00 | 83.33 | 100.00 | 0.25 |
| 2018 | 71.43 | 80.63 | 97.06 | 0.26 |
| Male (%) | ||||
| 2010 | 48.25 | 48.58 | 49.58 | 1.33 |
| 2014 | 47.85 | 48.57 | 49.26 | 1.41 |
| 2018 | 47.85 | 48.54 | 49.26 | 1.41 |
| Black (%) | ||||
| 2010 | 24.99 | 33.51 | 47.42 | 22.43 |
| 2014 | 24.76 | 33.23 | 46.66 | 21.90 |
| 2018 | 23.84 | 32.2 | 47.02 | 23.18 |
| Age (≥18, %) | ||||
| 2010 | 75.12 | 76.22 | 76.95 | 1.83 |
| 2014 | 76.08 | 77.28 | 78.81 | 2.73 |
| 2018 | 76.69 | 78.04 | 79.78 | 3.09 |
| Low education (%) | ||||
| 2010 | 17.39 | 21.74 | 24.68 | 7.29 |
| 2014 | 15.32 | 19.33 | 21.84 | 6.52 |
| 2018 | 13.35 | 16.92 | 19.21 | 5.86 |
| High education (%) | ||||
| 2010 | 12.88 | 16.52 | 21.81 | 8.93 |
| 2014 | 13.03 | 18.06 | 22.41 | 9.38 |
| 2018 | 14.43 | 18.59 | 24.49 | 10.06 |
| Poverty (%) | ||||
| 2010 | 14.21 | 17.31 | 19.55 | 5.34 |
| 2014 | 16.60 | 20.38 | 22.90 | 6.30 |
| 2018 | 15.43 | 18.35 | 20.84 | 5.41 |
| Median income ($) | ||||
| 2010 | 33066 | 38588 | 42871 | 9805 |
| 2014 | 33615 | 38610 | 43203 | 9588 |
| 2018 | 36276 | 42514 | 49392 | 13116 |
| Public assistance (%) | ||||
| 2010 | 1.36 | 1.58 | 2.04 | 0.68 |
| 2014 | 1.27 | 1.65 | 2.06 | 0.79 |
| 2018 | 1.22 | 1.38 | 1.76 | 0.54 |
| Vacant house (%) | ||||
| 2010 | 12.79 | 16.67 | 20.69 | 7.90 |
| 2014 | 13.30 | 16.45 | 20.78 | 7.48 |
| 2018 | 13.30 | 17.74 | 22.78 | 9.48 |
| Transportation accessibility (%) | ||||
| 2010 | 6.52 | 8.52 | 10.32 | 3.80 |
| 2014 | 6.30 | 8.04 | 10.01 | 3.71 |
| 2018 | 6.04 | 7.29 | 9.87 | 3.83 |
| No insurance coverage (%) | ||||
| 2010 | 15.50 | 16.95 | 18.70 | 3.20 |
| 2014 | 15.17 | 16.34 | 18.26 | 3.09 |
| 2018 | 10.09 | 11.33 | 12.18 | 2.09 |
| White/non-White residential segregation indexa | 24.67 | 30.00 | 35.33 | 10.66 |
| Black/White residential Segregation indexa | 26.67 | 30.83 | 38.67 | 12.00 |
| Physical characteristics | ||||
| Primary care providers | ||||
| 2010 | 61.70 | 78.76 | 105.93 | 44.23 |
| 2014 | 35.78 | 48.12 | 58.93 | 23.15 |
| 2018 | 37.44 | 47.56 | 68.25 | 30.81 |
| Ryan White HIV centers | ||||
| 2010 | 0.03 | 0.15 | 0.33 | 0.31 |
| 2014 | 0.03 | 0.11 | 0.39 | 0.36 |
| 2018 | 0.03 | 0.15 | 0.47 | 0.44 |
| Mental health centers | ||||
| 2010 | 0.15 | 0.41 | 1.00 | 0.85 |
| 2014 | 0.16 | 0.33 | 0.79 | 0.63 |
| 2018 | 0.16 | 0.38 | 1.00 | 0.84 |
| Social characteristics | ||||
| Gini index | ||||
| 2010 | 0.44 | 0.45 | 0.47 | 0.03 |
| 2014 | 0.45 | 0.46 | 0.48 | 0.03 |
| 2018 | 0.45 | 0.47 | 0.49 | 0.03 |
| Religious adherence (%)b | 41.2 | 53.6 | 59.4 | 18.2 |
| Family unity b | -1.81 | -1.16 | -0.51 | 1.30 |
| Community health b | -0.79 | -0.55 | -0.31 | 0.48 |
| Institution health b | -0.05 | 0.25 | 0.38 | 0.43 |
| Collective efficiency b | 406.70 | 503.00 | 629.20 | 222.50 |
| Health behaviors | ||||
| Smoking (%)c | ||||
| 2010 | 0.21 | 0.23 | 0.26 | 0.05 |
| 2014 | 0.19 | 0.21 | 0.23 | 0.01 |
| 2018 | 0.17 | 0.19 | 0.20 | 0.03 |
| Drinking (%)c | ||||
| 2010 | 0.11 | 0.13 | 0.15 | 0.04 |
| 2014 | 0.11 | 0.12 | 0.15 | 0.04 |
| 2018 | 0.15 | 0.16 | 0.17 | 0.03 |
Notes:
a Variables were only available since 2016 and data from 2010 to 2015 were imputed using data from 2016 throughout the analysis
b Variables were only available in one year and were used as constant variables throughout the analysis
c Variables were only available since 2011, and data in 2010 were imputed using data from 2011 throughout the analysis