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Table 4 Parameters of the multivariate regression analysis between DTT activity and PM chemical composition

From: Relationship between redox activity and chemical speciation of size-fractionated particulate matter

Independent Variables Unstandardized Coefficients Standardized Coefficients Significance level
  Value Std. Error   
Constant 0.0152 0.0033   0.001
PAH > 252(μg per g of PM mass) 1.43 × 10-4 8.78 × 10-6 0.812 < 0.001
Cl (%) -3.40 × 10-3 7.3 × 10-4 -0.199 0.001
Cr+V (%) 0.166 0.0386 0.214 0.002