Table A7.
Ratios of geometric means (95% confidence interval) of urinary metals by tertiles of NOx concentrations a.
| NOx | N | Model 1 b | Model 2 c | Model 3 d | Model 4 e |
|---|---|---|---|---|---|
| Tungsten | |||||
| <37.9 ppb | 101 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 37.9–69.0 ppb | 101 | 1.11 (0.75, 1.63) | 1.11 (0.76, 1.64) | 0.88 (0.57, 1.35) | 1.14 (0.69, 1.89) |
| ≥69.0 ppb | 102 | 2.02 (1.33, 3.06) | 2.10 (1.38, 3.21) | 1.35 (0.78, 2.32) | 1.73 (0.85, 3.53) |
| Per 45 ppb f | 304 | 1.79 (1.31, 2.45) | 1.85 (1.35, 2.55) | 1.34 (0.88, 2.03) | 1.77 (1.08, 2.88) |
| p for trend | 0.002 | 0.001 | 0.23 | 0.05 | |
| Uranium | |||||
| <37.9 ppb | 101 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 37.9–69.0 ppb | 101 | 0.37 (0.65, 1.26) | 0.89 (0.64, 1.23) | 0.73 (0.51, 1.04) | 0.88 (0.61, 1.25) |
| ≥69.0 ppb | 102 | 1.18 (0.88, 1.60) | 1.17 (0.86, 1.59) | 0.82 (0.56, 1.20) | 1.01 (0.65, 1.55) |
| Per 45 ppb | 304 | 1.37 (1.09, 1.73) | 1.38 (1.10, 1.74) | 0.99 (0.74, 1.31) | 1.05 (0.76, 1.45) |
| p for trend | 0.015 | 0.016 | 0.97 | 0.62 | |
a Results are in bold where it reached statistical significance (α = 0.05) in a model; b Adjusted for age, sex, race/ethnicity, BMI, education, and annual family income; c Adjusted for variables in Model 1, plus smoking status and pack-year; d Adjusted for variables in Model 2, plus log-transformed PM2.5; e Adjusted for variables in Model 2, plus study site; f Interquartile range for NOx.