Table 2

Filter Effects on Endothelial Function During Diesel Exhaust Exposure

Clean AirAir Pollution
(∼300 μg/m3)
Filtered Pollution
Reactive hyperemia index
 Patients with HF2.17 (1.8 to 2.5)1.72 (1.5 to 2.2)2.06 (1.5 to 2.6)
 Control subjects2.06 (2.0 to 2.5)2.15 (1.7 to 2.3)2.62 (1.9 to 2.9)
Augmentation index to assess arterial stiffness, %
 Patients with HF14 (5 to 28)10 (-2 to 20)8 (-2 to 19)
 Control subjects18 (2 to 34)11 (-3 to 33)5 (0 to 26)

Values are median (interquartile range), and Friedman’s test was used to detect differences across multiple sessions.

HF = heart failure.

  • p < 0.050 for clean air vs. air pollution.

  • p < 0.050 for air pollution vs. filtered pollution.

  • p < 0.050 for clean air vs. filtered pollution.