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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Environ Res. 2016 Jun 21;150:306–319. doi: 10.1016/j.envres.2016.06.019

Table 3.

Spearman correlation matrix of selected pollutants.a

PM2.5 BC T PAHs0.18 T PAHs0.18–2.5 OC0.18 OC0.18–2.5 EC0.18 EC0.18–2.5 T ROS0.18 T ROS0.18–2.5 DTT0.18 DTT0.18–2.5 GPx0.18 T metals0.18 T metal0.18–2.5 heat index Personal NOXa
O3 0.06 −0.71 −0.84 −0.81 −0.57 −0.71 −0.60 −0.13 0.12 −0.07 −0.55 −0.38 −0.30 −0.61 −0.52 0.67 −0.43
PM2.5 0.02 −0.12 −0.07 −0.17 0.15 0.08 0.19 0.05 0.45 −0.17 0.20 −0.18 −0.27 −0.03 0.17 0.16
BC 0.92 0.92 0.84 0.89 0.82 0.47 0.18 0.24 0.79 0.62 0.18 0.81 0.72 −0.55 0.47
T PAHs0.18 0.94 0.80 0.87 0.75 0.37 0.10 0.18 0.76 0.52 0.25 0.81 0.68 −0.70 -
T PAHs0.18–2.5 0.73 0.85 0.64 0.32 −0.02 0.09 0.68 0.49 0.29 0.76 0.63 −0.68 -
OC0.18 0.76 0.83 0.46 0.45 0.26 0.86 0.61 0.19 0.80 0.70 −0.43 -
OC0.18–2.5 0.76 0.47 0.12 0.31 0.63 0.62 0.28 0.64 0.63 −0.53 -
EC0.18 0.58 0.42 0.39 0.77 0.57 0.02 0.68 0.66 −0.27 -
EC0.18–2.5 0.34 0.41 0.50 0.25 −0.21 0.32 0.27 0.09 -
T ROS0.18 0.30 0.41 0.17 −0.08 0.25 0.18 0.14 -
T ROS0.18–2.5 0.14 0.37 −0.07 0.13 0.30 0.12 -
DTT0.18 0.44 0.10 0.81 0.68 −0.39 -
DTT0.18–2.5 0.20 0.48 0.57 −0.39 -
GPx0.18 0.24 0.18 −0.44 -
T metalsb0.18 0.80 −0.54 -
T metals0.18–2.5 −0.37 -
heat index −0.25

Abbreviations: DTT: dithiothreitol; EC: elemental carbon; OC: organic carbon; PM: particulate matter; ROS: reactive oxygen species; T: total;

Bold numbers indicate correlation values ≥ 0.60 and P < 0.05;

a

Correlations for personal NOx were calculated with 7-day average of ambient pollutants and heat index;

b

Total sum of transition metals include V, Cr, Mn, Ni, Cu and Fe.