Figure 3From: Experimental determination of the respiratory tract deposition of diesel combustion particles in patients with chronic obstructive pulmonary disease Deposition fraction (DF) for 20–30 nm particles as function of FEV 1 /FVC. Black diamonds (♦) are for COPD patients, white squares (□) for healthy subjects. A similar association between DF and FEV1/FVC was found over the complete ultrafine particle size range (< 100 nm).Back to article page