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Table 2 Hazardous air pollutants with correlations greater thanρ> 0.80, Texas, 1999

From: Air toxics and birth defects: a Bayesian hierarchical approach to evaluate multiple pollutants and spina bifida

Pollutant Acet Acro Form Benz MCl EDbr PD TCE EDcl VCl DPM Ni
Acet 1.00 0.97 0.98 0.85 0.79        
Acro 0.97 1.00 0.95 0.81 0.68        
Form 0.98 0.95 1.00 0.89 0.82        
Benz1 0.85 0.81 0.89 1.00 0.74        
MCl1 0.79 0.68 0.82 0.74 1.00        
EDbr       1.00 0.98 1.00     
PD       0.98 1.00 0.99     
TCE2       1.00 0.99 1.00     
EDcl          1.00 0.98   
VCl3          0.98 1.00   
DPM4            1.00 0.87
Ni            0.87 1.00
  1. *Abbreviations: Acet acetaldyhyde, Acro acrolein, Form formaldehyde, Benz benzene, MCl methylene chloride, EDbr ethylene dibromide, PD propylene dichloride, TCE 1,1,2,2-Tetrachloroethane, EDcl ethylene dichloride, VCl vinyl chloride, DPM diesel particulate matter, Ni nickel compounds.
  2. 1Benzene and methylene chloride selected to represent the highly correlated group including acetaldehyde, acrolein and formaldehyde.
  3. 21,1,2,2-Tetrachloroethane selected to represent the highly correlated group including ethylene dibromide and propylene dichloride.
  4. 3Vinyl Chloride selected to represent the highly correlated group including ethylene dichloride.
  5. 4Diesel particulate matter selected to represent the highly correlated group including nickel compounds.