The average salary is 24,000, but most people earn less. Most people have an above average number of feet. In his fourth lesson of a weekly series, author Michael Blastland cracks the myth of the average.ith incomes, to take another example, many people are aware that the average in the UK (also known as the mean) is about 24,000 a year (in fact, about 463 a week).
Unlike a colonoscopy, however, the 'range' of a sigmoidoscopy is not as good; whilst a colonoscopy can visualise the entire large bowel, a sigmoidoscopy can only visualise as far as the sigmoid colon (it is therefore primarily used to visualise the rectum and parts of the sigmoid colon).nlike a colonoscopy, however, the 'range' of a sigmoidoscopy is not as good; whilst a colonoscopy can visualise the entire large bowel, a sigmoidoscopy can only visualise as far as the sigmoid colon (it is therefore primarily used to visualise the rectum and parts of the sigmoid colon).
Flexible sigmoidoscopy is similar to colonoscopy, but it only examines the lower third of the colon. Not surprisingly, that means it can miss a large number of polyps, says Richard Schilsky, MD, a specialist in gastrointestinal cancers at the University of Chicago.Both FOBT and FIT look for hidden blood in the stool.octors consider it the gold standard for detecting polyps that can lead to colon cancer as well as for the cancer itself. But many people avoid the procedure because of discomfort and a small risk of complications.