Table 4

Univariate correlations between the yearly cases of NE and climate variables of single months.

Spearman R

P

July temperature Y-3

-0.37

<0.001

July precipitation Y-3

0.35

<0.001

July temperature Y-2

0.34

<0.001

July precipitation Y-2

0.20

0.01

July temperature Y-1

0.21

0.01

July precipitation Y-1

0.02

0.84

April temperature Y-1

0.17

0.04

April precipitation Y-1

-0.09

0.25

April temperature Y 0

0.27

0.01

April precipitation Y 0

-0.30

<0.01

Months representative for summer (July) or spring (April), three (Y-3), two (Y-2), one year(s) (Y-1) before, or during the same year (Y 0).

Associations indicated in bold remain significant after sequential Bonferroni correction

Clement et al. International Journal of Health Geographics 2009 8:1   doi:10.1186/1476-072X-8-1