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Table 4 Spearman correlation matrix of 5-day average of components in size-fractionated PMa

From: Associations between microvascular function and short-term exposure to traffic-related air pollution and particulate matter oxidative potential

  PM0.18 PM0.18–2.5 PM2.5–10
Pollutants T PAHs Hopa-nes OA OC EC T ROS WS ROS DTT T Metals T mass T PAHs Hopa-nes OA OC EC T ROS WS ROS DTT T Metals T mass OC EC T ROS WS ROS DTT T Metals
PM0.18                           
Mass 0.58 0.63 0.29 0.74 0.62 0.47 0.45 0.72 0.70 0.00 0.50 0.44 0.24 0.52 0.24 0.18 0.14 0.38 0.57 −0.32 0.26 0.11 −0.40 −0.36 0.34 0.23
T PAHs   0.89 0.51 0.80 0.75 0.10 0.11 0.76 0.81 0.13 0.94 0.86 0.71 0.87 0.37 0.18 0.21 0.52 0.68 −0.60 0.55 0.51 −0.30 −0.42 0.57 0.61
Hopanes    0.60 0.82 0.72 0.17 0.16 0.79 0.78 0.13 0.85 0.78 0.58 0.80 0.42 0.16 0.20 0.56 0.68 −0.47 0.49 0.46 −0.27 −0.38 0.58 0.61
OA     0.52 0.27 0.09 0.11 0.42 0.30 0.21 0.54 0.65 0.55 0.54 0.25 0.08 0.23 0.45 0.37 −0.33 0.32 0.40 −0.10 −0.15 0.66 0.35
OC      0.83 0.45 0.44 0.86 0.80 0.08 0.73 0.72 0.43 0.76 0.46 0.26 0.28 0.61 0.70 −0.36 0.53 0.36 −0.25 −0.29 0.49 0.57
EC       0.42 0.42 0.77 0.68 0.19 0.64 0.51 0.36 0.76 0.58 0.39 0.28 0.57 0.66 −0.23 0.57 0.31 −0.07 −0.07 0.29 0.67
T ROS        0.98 0.41 0.25 0.01 −0.02 −0.02 −0.15 0.12 0.34 0.30 0.28 0.17 0.18 0.28 0.20 −0.04 0.12 0.13 −0.01 0.09
WS ROS         0.42 0.23 −0.01 −0.01 0.00 −0.12 0.13 0.35 0.28 0.27 0.15 0.16 0.26 0.21 0.00 0.12 0.15 0.00 0.11
DTT          0.81 0.00 0.68 0.59 0.30 0.63 0.50 0.14 0.17 0.44 0.68 −0.42 0.45 0.25 −0.27 −0.37 0.40 0.45
T Metalsb           0.00 0.76 0.61 0.33 0.64 0.32 0.13 0.18 0.48 0.80 −0.46 0.50 0.33 −0.40 −0.51 0.42 0.51
PM0.18–2.5                           
Mass            0.18 0.12 0.21 0.36 0.19 0.65 0.67 0.48 0.24 0.26 0.15 0.29 0.47 0.43 0.32 0.24
T PAHs             0.90 0.73 0.85 0.32 0.09 0.22 0.49 0.63 −0.54 0.60 0.56 −0.29 −0.44 0.67 0.65
Hopanes              0.77 0.81 0.23 0.08 0.18 0.47 0.52 −0.60 0.55 0.51 −0.34 −0.43 0.71 0.52
OA               0.70 0.15 −0.03 0.14 0.35 0.27 −0.53 0.31 0.47 −0.20 −0.30 0.61 0.37
OC                0.47 0.31 0.35 0.62 0.63 −0.42 0.59 0.56 −0.09 −0.16 0.63 0.67
EC                 0.41 0.46 0.25 0.27 0.15 0.31 0.33 0.27 0.29 0.18 0.52
T ROS                  0.84 0.37 0.30 0.27 0.11 0.14 0.33 0.47 0.11 0.14
WS ROS                   0.40 0.32 0.22 0.16 0.26 0.43 0.44 0.30 0.25
DTT                    0.57 −0.16 0.42 0.35 0.14 0.01 0.41 0.53
T Metalsb                     −0.37 0.51 0.23 −0.11 −0.20 0.32 0.53
PM2.5–10                           
Mass                      −0.04 −0.01 0.60 0.67 −0.31 −0.06
OC                       0.55 0.06 0.00 0.32 0.75
EC                        0.19 0.11 0.39 0.51
T ROS                         0.87 −0.11 0.23
WS ROS                          −0.20 0.09
DTT                           0.39
  1. Abbreviations: DTT dithiothreitol, EC elemental carbon, OA Organic acids, OC organic carbon, PM particulate matter, ROS reactive oxygen species, T total, WS water-soluble
  2. Bold numbers indicate correlation values ≥ 0.60 and P < 0.05
  3. aPollutants are mean-centered by region
  4. bTotal sum of transition metals include V, Cr, Mn, Ni, Cu and Fe