Participants From November 2015 to February 2020, 275 patients appointed to outpatient follow-up were approached by clinicians for participation (see figure 2). Eleven declined and 264 were enrolled. There was an average of 3 months between enrolment and follow-up, and 113 patients were lost to the study in this time. By March 2020, 151 patients had participated when the study was suspended due to COVID-19 restrictions. All 151 participants were white, Scottish, with mean age of 64.5 (11.5) years.
