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Table 3 Correlation (Spearman) matrix of exposure levels at baseline (1993/1999)

From: Long-term exposure to road traffic noise and stroke incidence: a Danish Nurse Cohort study

 

Lden

Ld

Le

Ln

PM2.5

PM10

NO2

NOx

Lden

1

       

Ld

0.997

1

      

Le

0.996

0.998

1

     

Ln

0.991

0.991

0.996

1

    

PM2.5

0.360

0.365

0.363

0.357

1

   

PM10

0.239

0.251

0.246

0.233

0.846

1

  

NO2

0.606

0.619

0.616

0.601

0.649

0.510

1

 

NOx

0.496

0.514

0.507

0.489

0.572

0.541

0.922

1

  1. Abbreviations: Lden Annual mean day-evening-night (24-h) road traffic noise level, Ld Annual mean day-time (07:00–19:00 h) road traffic noise level, Le Annual mean evening (19:00–23:00 h) road traffic noise level, Ln Annual mean night-time (23:00–07:00 h) road traffic noise level, PM2.5 Particulate matter with an aerodynamic diameter of < 2.5 μg/m3, PM10 Particulate matter with an aerodynamic diameter of < 10 μg/m3, NO2 Nitrogen dioxide, NOX Nitrogen oxides