Distribution of pain and burden scores. This figure shows the distribution of pain and burden scores (5-point scale) of colonic insufflation and the total CT colonography procedure. Above the bars the medians, means and P values are presented (from top to bottom). Pain and burden of insufflation and complete CT colonography procedure were significantly lower with alfentanil.
Boellaard et al. BMC Gastroenterology 2013 13:94 doi:10.1186/1471-230X-13-94