Methods: We investigated fibrin polymerization by turbidity (maximum absorbance mOD), clot structure by confocal
microscopy (fibre number per μm) and fibrin pore size by permeability (Ks × 10−10 cm2
) in 103 patients
with deep vein thrombosis and 121 healthy controls, for whom levels of air pollution exposure had been recorded.
Exposure groups were defined by mean PM10 concentrations over the 730 days before the event.