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Table 2 Regression models for fast food density (raw and z-score standardized data), King County, Washington State, USA census tracts

From: Arterial roads and area socioeconomic status are predictors of fast food restaurant density in King County, WA

  Area-based density (fast food restaurants/tract km 2 ) Population-based density (fast food restaurants per tract capita)
Raw data         
Model 1 Coeff Std. error z value Pr(>|z|) Coeff Std. error z value Pr(>|z|)
   Intercept 3.097 0.444 6.971 <0.001 -5.537 0.389 -14.243 <0.001
   Median hh income ($1000) -0.066 0.006 -10.451 <0.001 -0.040 0.005 -7.349 <0.001
   % Nonwhite -0.012 0.006 -1.986 0.047 -0.011 0.006 -1.968 0.049
Model 2         
   Intercept 1.084 0.469 2.310 0.021 -6.366 0.444 -14.332 <0.001
   Median hh income ($1000) -0.045 0.006 -7.145 <0.001 -0.032 0.006 -5.376 <0.001
   % Nonwhite -0.006 0.006 -0.97 0.332 -0.011 0.005 -1.944 0.052
   Arterial density (km/km2) 0.168 0.023 7.155 <0.001 0.086 0.023 3.767 <0.001
Standardized data         
Model 1         
   Intercept -0.959 0.089 -10.774 <0.001 -8.100 0.081 -99.963 <0.001
   Median hh income ($1000) -1.292 0.124 -10.451 <0.001 -0.791 0.108 -7.349 <0.001
   % nonwhite -0.198 0.100 -1.986 0.047 -0.176 0.089 -1.968 0.049
Model 2         
   Intercept -1.029 0.083 -12.416 <0.001 -8.118 0.079 -102.344 <0.001
   Median hh income ($1000) -0.879 0.123 -7.145 <0.001 -0.617 0.115 -5.376 <0.001
   % nonwhite -0.089 0.092 -0.970 0.332 -0.171 0.088 -1.944 0.052
   Arterial density 0.569 0.080 7.155 <0.001 0.292 0.077 3.767 <0.001