Table 2.

Prevalence of OCD: IBD, significant polyps and CRC by age and endoscopy unit referral

Age (years)	Disease prevalence based on age and referral pathway (%)
	York medical				Scarborough (pooled)				York surgical
	OCD	IBD	Polyps	CRC	OCD	IBD	Polyps	CRC	OCD	IBD	Polyps	CRC
18–29	34.6	34.0	0.4	0.2	17.6	16.8	0.8	0	8.1	6.8	0.9	0.4
30–39	39	36.8	1.5	0.7	16.5	13.1	3	0.2	11.1	6.7	3.5	0.9
40–49	24.3	21.0	2.6	0.7	9.8	7.6	1.3	0.9	10.1	4.5	3.1	2.5
50–59	14.8	11.3	1.3	2.2	12.0	5.4	5.0	1.6	14.6	2.4	8.7	3.5

CRC, colorectal cancer; IBD, inflammatory bowel disease; OCD, organic colonic disease.