CFTR and cystic fibrosis: In the present study, although the number of individuals not on CFTR modulators (19%) was higher than expected, as approximately 90% of the CF population should be eligible for this treatment [CF Trust - Fighting for life-saving drugs] this still represented a small number of the CF population (n=20 participants) and therefore these results may not be generalisable and difficult to compare against those on modulators and the results of the 2018 survey.