Fig. 2.

Forest plot demonstrating the differences in fat-soluble vitamin concentrations in clinically-stable people with CF versus non-CF controls. N.b. ‘vitamin A’ is inclusive of ‘retinol’, ‘25(OH)D’ is inclusive of ‘vitamin D’ and ‘vitamin E’ is inclusive of ‘tocopherol’ and ‘α-tocopherol’. 95% CI, 95% confidence interval; IV, inverse variance; SD, standard deviation. N.b. a negative SMD represents a lower vitamin concentration in CF versus controls, whereas a positive SMD represents a higher vitamin concentration in CF versus controls.