Eligibility for Controls. Control participants are cancer-free persons, to which we will compare the cases. In ESCCAPE, controls will be recruited from across various outpatient hospital wards at KCMC (general surgery, orthopaedic surgery, outpatients and ophthalmology wards) or from visitors to the hospital. Patients who are eligible to be controls are those: • Age 18 years or over at the time of being approached • Do not have cancer now or in the past • Are not being investigated for suspected cancer • Are not attending the hospital with a digestive problem • Have not already spent more than 3 nights in the hospital Please note that controls should be recruited even if they don’t come from the regular catchment area of the hospital, just as cases would be.
