Gastroenterology service in a teaching hospital in rural New Zealand, 1991-2003

Figure 2 Indications for colonoscopies over the three years studied. There was a significant increase in colonoscopies in patients with a past medical history of colorectal cancer (^aP = 0.015) and in patients with a positive family history of colorectal cancer and/or polyps (^dP < 0.001). But there was a significant decrease in colonoscopies for rectal bleeding (^fP < 0.001), change in bowel habit (^hP < 0.001), and IBD surveillance (ⁱP < 0.019).