Table 1.

Annual newly diagnosed cases, population, and comparison of demographic factors between years.

Demographic factors	2017	2018	2019	2020	P
IBD	63	57	82	102	NA
CD	39	44	59	75	NA
UC	24	13	23	27	NA
Population, n	869,801	835,932	798,713	765,440	NA
CD:UC ratio	1.6:1	3.4:1	2.6:1	2.8:1	0.266
M:F ratio	1.7:1	2.4:1	2.4:1	2.3:1	0.789
Diagnosis age, year (IQR)	15.0 (13.1–17.5)	15.7 (14.2–17.4)	16.5 (13.5–17.8)	15.4 (13.4–17.2)	0.424

IBD, inflammatory bowel disease; CD, Crohn's disease; UC, ulcerative colitis.