Table 4

Correlation matrix and overall Moran coefficients between components of the vulnerability index and the accessibility measurement (distance/time and gravity model)

Pearson's correlation

Moran's I*

1

2

3

4

5

1

2

3

4

5

1. Gravity model

1

-0.329**

0.417**

0.504**

0.088**

1

-0.307

0.372

0.443

0.086

2. Accessibility to sites (minutes)

-0.329**

1

-0.476**

-0.325**

-0.400**

-0.307

1

-.449

-0.308

-0.371

3. Vulnerability index of populations

0.417**

-0.476**

1

0.680**

0.743**

0.372

-.449

1

0.468

0.475

4. Socio-demographic components

0.504**

-0.325**

0.680**

1

0.159**

0.443

-0.308

0.468

1

0.142

5. Socio-economic components

0.088**

-0.400**

0.743**

0.159**

1

0.086

-0.371

0.475

0.142

1

** Correlation is significant at the 0.01 level (2-tailed).

* Correlation matrix used: rook contiguity (4 way connected) in respect of which the contiguity order is 1.

Robitaille and Herjean International Journal of Health Geographics 2008 7:2   doi:10.1186/1476-072X-7-2