Recent trends in the epidemiology and clinical outcomes of inflammatory bowel disease in South Korea, 2010-2018

Table 1 Incidence rates of Crohn’s disease and ulcerative colitis in South Korea from 2010 to 2018

	Year of diagnosis
	2010	2011	2012	2013	2014	2015	2016	2017	2018
CD
No. of incident cases	1271	1431	1552	1581	1717	1718	1770	1709	1749
Incidence rate1	2.51	2.81	3.03	3.07	3.32	3.30	3.39	3.26	3.33
Male	3.47	3.86	4.27	4.41	4.65	4.59	4.68	4.51	4.69
Female	1.55	1.75	1.79	1.73	1.98	2.01	2.08	2.01	1.97
M/F ratio	2.24	2.20	2.38	2.54	2.35	2.28	2.25	2.25	2.38
UC
No. of incident cases	2701	3050	2987	3116	3397	3788	3826	4227	4317
Incidence rate1	5.34	5.99	5.84	6.06	6.56	7.28	7.32	8.06	8.21
Male	6.24	7.03	7.01	7.16	7.80	8.86	8.76	9.89	10.28
Female	4.44	4.95	4.66	4.94	5.32	5.70	5.87	6.23	6.15
M/F ratio	1.41	1.42	1.50	1.50	1.47	1.56	1.49	1.59	1.67
UC/CD ratio	2.13	2.13	1.92	1.97	1.98	2.20	2.16	2.47	2.47

¹Per 10⁵ person-years.

CD: Crohn’s disease; UC: Ulcerative colitis.