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Table 6 Sensitivity analyses including best predictor in each category, all summary measures.

From: Land use regression modeling of intra-urban residential variability in multiple traffic-related air pollutants

Indicator Type Traffic Indicator Estimate(s), p-value(s) from multivariate model Model R2
Base model    R2 = .31
Cumulative density scores: Unweighted 500 m buffer (n = 54) β1 = 5.39*10-4 (.49)
β2 = 5.63*10-3 (.41)
R2 = .39
Summary measures: Total roadway length within:   
  50 meters
*Still Winds (n = 54)
β1 = 3.94*10-4 (.18)
β2 = 4.08*10-3 (.01)
R2 = .41
  100 meters
*Still Winds (n = 54)
β1 = 2.15*10-4 (.14)
β2 = 1.27*10-3 (.03)
R2 = .47
  200 meters
*Still Winds (n = 54)
β1 = 1.10*10 -4 (.01)
β2 = 4.38*10 -4 (.02)
R 2 = .52
  300 meters
*Still Winds (n = 54)
β1 = 2.99*10-5 (.11
β2 = 2.01*10-4 (.04)
R2 = .48
Distance-based measures: To nearest highway (>19,000 cars/day)
* Still Winds (n = 54)
β1 = 0.452 (.06)
β2 = 0.549 (.04)
R2 = .45
Characteristics of Nearest major road: Diesel fraction
* Still Winds (n = 34)
β1 = -1.06 (.02)
β2 = 34.6 (.02)
R 2 = .54
  Trucks per day
* Still Winds (n = 34)
β1 = -7.41*10 -5 (.06)
β2 = 3.51*10 -3 (.02)
R 2 = .54
  Trucks/Distance to major road
* Still Winds (n = 34)
β1 = -6.31*10 -3 (.03)
β2 = s0.119 (.05)
R 2 = .54
  1. Final model bolded; models with diesel-based terms italicized. Traffic indicators for EC.