Fig. 2. Plasma versus Induced Sputum Concentrations of a.) Total Carotenoids (r = 0.798, p < 0.001), b.) Lycopene (r = 0.596, p = 0.041) and c.) ß-carotene (r = 0.845, p < 0.001) in asthma and control subjects. Data has been log transformed for analysis. Note that the number of data points varies because only non-zero concentrations are retained when data is log transformed.