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Table 3 Spearman's rank correlations (2-sided significance) for fixed factors. *p < 0.05, **p < 0.01, ***p < 0.005.

From: Toxic effects of brake wear particles on epithelial lung cells in vitro

 

Iron

Copper

Manganese

TC

OC

EC

Number

Mass

Copper

0.974***

       

Manganese

0.991***

0.960***

      

TC

0.500

0.533

0.527

     

OC

0.445

0.489

0.467

0.989***

    

EC

0.883**

0.811*

0.955***

0.739

0.739

   

Number

0.793***

0.798***

0.785***

0.593*

0.533

0.847*

  

Mass

0.815***

0.780***

0.811***

0.451

0.401

0.847*

0.754***

 

Surface

0.829***

0.776***

0.846***

0.549

0.478

0.811*

0.824***

0.952***