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Table 2 Correlations between areas of the five measures, and between the measures and potential determinants. Spearman's rank correlation. SDE1 = standard deviational ellipse at 1 standard deviation; SDE2 = standard deviational ellipse at 2 standard deviations; RNB = road network buffer; STT = standard travel time polygon; RTT = relative travel time polygon.

From: A suite of methods for representing activity space in a healthcare accessibility study

 

SDE1

SDE2

RNB

STT

RTT

Correlations between the areas of the activity space measures

     

SDE1

1.000

    

SDE2

1.000

1.000

   

RNB

0.782

0.782

1.000

  

STT

-0.113

-0.113

-0.153

1.000

 

RTT

0.709

0.709

0.924

-0.104

1.000

Correlation between area and the number of reported activity destinations

0.355

0.355

0.479

0.068

0.396

Correlation between area and maximum travel time to a routine destination

0.686

0.686

0.900

-0.362

0.954

Correlation between area and travel time to nearest primary care opportunity

0.277

0.277

0.188

-0.536

0.099

Correlation between area and residence located within 5 km of a primary road

-0.154

-0.154

-0.121

0.385

-0.085