Table 1. Spearman Coefficients for Each Correlation Calculated between the Fraction of Denver Census Tract Demographic and NO2 Tropospheric Column or PM2.5 Surface Concentration, Population-weighted Average, and Population Statistics for Each Racial or Ethnic Groupa.
| racial or ethnic group | spearman
coef. (p value) |
pop.
wtd. ave. |
pop.
stats |
|||
|---|---|---|---|---|---|---|
| NO2 | PM2.5 | NO2 (mol m–2) (×10–5) | PM2.5 (μg m–3) | tot. pop. pop. frac. | ||
| non-Hispanic White | –0.22 (<0.001) | –0.13 (0.003) | 4.98 + 0.04 | 7.18 + 0.03 | 1,654,648 | 59.8% |
| Black and African American | –0.02 (0.7) | –0.14 (0.001) | 4.93 + 0.03 | 7.00 + 0.03 | 152,573 | 5.5% |
| Asian and Asian American | –0.45 (<0.001) | –0.42 (<0.001) | 4.78 + 0.04 | 7.00 + 0.03 | 132,337 | 4.8% |
| American Indian and Alaska Native | 0.42 (<0.001) | 0.40 (<0.001) | 5.24 + 0.03 | 7.33 + 0.02 | 12,824 | 0.5% |
| Native Hawaiian and Pacific Islander | –0.13 (0.002) | –0.21 (<0.001) | 4.90 ± 0.03 | 6.97 + 0.03 | 4,463 | 0.2% |
| some other race | –0.07 (0.1) | –0.10 (0.03) | 5.03 + 0.04 | 7.17 + 0.03 | 13,859 | 0.5% |
| two or more races | –0.40 (<0.001) | –0.37 (<0.001) | 4.95 ± 0.04 | 7.12 ± 0.03 | 122,175 | 4.4% |
| Hispanic or Latino | 0.39 (<0.001) | 0.33 (<0.001) | 5.28 ± 0.03 | 7.32 ± 0.02 | 671,821 | 24.3% |
a
Uncertainties in population-weighted average are standard errors of the mean.