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).
A colonoscopy is a screening test for colon cancer. It is recommended that people of average risk get a colonoscopy or other type of screening every 10 years starting at age 50.People at high risk should begin screening earlier, and sometimes more often, according to the American Cancer Society. However, it can cost significantly more -- up to about $1,500 if performed in a hospital, which would charge a facility fee. 2  The disadvantage of flexible sigmoidoscopy is that the doctor only is able to view half of the colon, and it is recommended every five years instead of every 10.