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Sensitivity analyses including best predictor in each category, all summary measures. |
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| Indicator Type |
Traffic Indicator |
Estimate(s), p-value(s) from multivariate model |
Model R2 |
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| Base model (w/out traffic) |
R2 = .74 |
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| Cumulative Density scores |
Unweighted 500 m traffic density (n = 57) |
β1 = 4.74*10-4 (.17) |
R2 = .75 |
| Summary Measures |
Total roadway length: |
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| 50 meters (n = 57) |
β1 = 1.31*10-4 (.35) |
R2 = .74 |
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| 100 meters (n = 57) |
β1 = 1.48*10-4(.02) |
R2= .76 |
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| 200 meters (n = 57) |
β1 = 1.42*10-5 (.56) |
R2 = .74 |
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| 300 meters (n = 57) |
β1 = 5.54*10-6 (.57) |
R2 = .74 |
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| Distance-based measures |
Distance to nearest designated truck route (n = 57) |
β1 = 1.80*10-5 (.62) |
R2 = .74 |
| Characteristics of nearest major road |
Average daily traffic (ADT) (n = 57) |
β1 = -3.04*10-6 (.25) |
R2 = .74 |
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Final model bolded; models with diesel-based terms italicized. Traffic indicators for PM2.5 | |||
Clougherty et al. Environmental Health 2008 7:17 doi:10.1186/1476-069X-7-17 |
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