Figure 1.

Trial profile. Of 100 who were eligible, 41 (41%) consented to participate and successfully underwent the Cytosponge procedure. Of these, 39 were eligible for week 1 and 38 for week 2 follow-up interviews. Separately, 35 completed Cytosponge samples were available for pathological analysis; the results from which were correlated with 21 centrally reviewed biopsy or surgical specimens, and data drawn from 14 local reports.