Fig 4 Participants’ experience, anxiety, and distress related to Cytosponge test. Anxiety measured at day 0, 7, and 90 using six item short form short form Spielberger state trait anxiety inventory (values >40 denote clinically significant anxiety). Distress associated with Cytosponge test measured using impact of events scale. Intrusion and avoidance scores >19 denote high impact of test and >38 for total score. Participants rated their experience of Cytosponge using a visual analogue scale, with 0 representing the “worst experience” and 10 the “best experience”