CT colonography : a survey of general practitioners’ knowledge and interest

Purpose: To verify the knowledge and interest of general practitioners on computed tomography colonography (CTC). Materials and methods: In 2014, a Web-based questionnaire was proposed to all general practitioners of [Milan, Italy]. The questionnaire consisted of ten questions concerning general practitioners’ knowledge about CTC, including application of guidelines in clinical scenarios and diagnostic performance. Results: Out of 1,053 general practitioners, 231 (22 %), 155 men and 76 women (mean age 58 years), completed the survey. We found a significant difference between the age of responders and that of non-responders (p = 0.0033). Of the 231 responders, 84 % were aware of the possibility of using CTC as a method for examining the colon–rectum. However, only 57 % were aware about low X-ray exposure delivered by CTC and about the possibility of using a reduced cleansing protocol. Only 48 % were aware that CTC accuracy in diagnosing 10-mm or larger polyps and colorectal cancers was similar to that of conventional colonoscopy, while 62 % were informed about CTC advantages in comparison with double-contrast barium enema; 59 % thought that CTC had a potential role as a screening test; 85–86 % suggested CTC in the case of refused or incomplete conventional colonoscopy; 79 % suggested immediate conventional colonoscopy in the case of at least one 10-mm polyp. About 54 % usually prescribe one CTC every 4–6 months, while 36 % never have, 3 % one CTC per month, and 7 % one every 2–3 months. Ninety-four per cent declared that they were willing to attend a course on CTC. Conclusion: General practitioners have limited knowledge concerning CTC. Radiological societies should fill this gap offering dedicated educational initiatives.