Yield of same day dual endoscopy for patients referred for assessment of positive Fecal Occult Blood Test.

Interventions: This study has a prospective and a retrospective component. This study is single center study, which will be conducted at the Gastroenterology department at the Princess Alexandra hospital. For the retrospective component, we will audit all patient records who have undergone Gastroscopy and Colonoscopy on the same day for investigation of positive FOBT from Jan 2010 until July 2019.
Gastroscopy which will take approximately 10 mins will be done on the same day as the colonoscopy (either immediately before or after the colonoscopy). There will be no additional anesthesia or observation required for the gastroscopy. Both colonoscopy and gastroscopy will be performed by a gastroenterologist. Patients will not be required to fill additional questionnaire or have phone interviews.
The retrospective part of the study will involve reviewing electronic medical records to collect information (demographic details including age, sex, BMI, ethnicity, medications, co-morbidities, outcomes of gastroscopy and colonoscopy, quality of bowel preparation, laboratory data (Full blood count, celiac serology, Iron studies and Helicobacter pylori status)) for patients who have undergone same day gastroscopy and colonoscopy.
The participants would have undergone this screening procedure in the absence of this study
Primary outcome(s): 1.To assess the frequency of common gastrointestinal conditions (namely IDA and Celiac disease) and gastrointestinal symptoms in patients referred for evaluation of positive FOBT. This is a composite primary outcome and this will be assessed from endoscopy.[To be assessed on the day of the procedure]
Study Design: Purpose: Screening;Duration: Cross-sectional;Selection: Defined population;Timing: Both