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Table 2 Spearman's rank correlations (2-sided significance) for fixed factors and endpoints. *p < 0.05.

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

  IL-8 Occludin ROS
Iron 0.217 -0.678* 0.476
Copper 0.259 -0.615* 0.392
Manganese 0.224 -0.636* 0.434
TC 0.608* 0.014 0.028
OC 0.594* 0.049 0.000
EC 0.342 -0.577 0.523
Number 0.364 -0.301 0.196
Mass 0.231 -0.469 0.490
Surface 0.217 -0.385 0.385