Upper endoscope for colonoscopy: Evidence is still too sparse to utilize [1]

abdominal pain; body mass; cancer screening; colon stenosis; colonoscope; colonoscopy; colorectal adenoma; colorectal cancer; endoscope; human; letter; multivariate logistic regression analysis; priority journal; sex difference; Body Mass Index; Cecum; Colonoscopes; Colonoscopy; Endoscopes; Female; Humans; Intestinal Polyps; Male; Middle Aged; Pain; Patient Acceptance of Health Care