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Table 1 List of explanatory variables for assessing the spatial distribution of heat-related mortality exceedances and loadings for extracted principal components

From: Fine-scale spatial variability of heat-related mortality in Philadelphia County, USA, from 1983-2008: a case-series analysis

 

Component (% Variance Explained)

 

1 (35.9)*

2 (16.4)

3 (10.2)

4 (7.7)

5 (5.5)*

6 (4.4)*

ZONING AND LAND USE

% Low Density Residential

-.636

-.290

.122

.398

.017

.088

% Mid Density Residential

-.402

-.456

.012

-.015

-.578

.087

% High Density Residential

.702

.131

-.217

-.079

.449

-.129

% Recreational

-.404

-.438

-.058

.304

.396

-.323

% Industrial

.161

.020

.646

-.420

.229

.161

% Mixed Use

-.073

.142

-.256

.394

.434

.592

% Commercial

.045

.797

-.418

.015

.029

.036

% Building Coverage

.514

.663

-.442

-.053

-.049

-.078

DEMOGRAPHICS

% White

-.647

.610

.361

-.129

.046

-.060

% Black

.471

-.648

-.513

.086

-.071

.051

% American Indian

.655

.039

.457

.287

.012

-.028

% Asian

-.017

.695

-.165

.144

-.244

.099

% Pacific Islander

.400

.271

.255

.656

.003

.181

% Other race

.615

.146

.541

.333

-.079

-.041

% Two or more races

.500

.324

.292

.572

-.334

-.110

% Nonwhite

.647

-.610

-.361

.129

-.046

.060

% Over age 65

-.345

.300

-.003

.142

.159

-.620

% Without hs diploma

.799

-.135

.402

-.191

.107

-.095

Median per capita income

-.651

.455

-.328

.181

.078

-.103

% Below Poverty Line

.912

-.005

.006

.066

.266

.050

% Below 2x Poverty Line

.925

-.115

.060

-.053

.202

-.033

% Living Alone over age 65

-.648

.044

.370

-.187

.095

.177

% Living Alone

-.768

.260

.086

-.085

.200

.247

SURFACE TEMPERATURE

      

Surface Temp. Image (5/15/2004)

.762

.360

.001

-.332

-.201

.107

Surface Temp. Image (7/29/2008)

.849

.340

-.152

-.261

-.124

.042

  1. Loadings greater than 0.6 or less than -0.6 are shown with bold text and statistically significant components in the regression model are identified with an asterisk