Table 2

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

Area-based density (fast food restaurants/tract km²)

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

Hurvitz et al. International Journal of Behavioral Nutrition and Physical Activity 2009 6:46   doi:10.1186/1479-5868-6-46