Incidence, disease course, therapeutic strategies and outcomes of inflammatory bowel disease-unclassified patients in Western Hungary: A population-based cohort

Table 1 Demographic and clinical characteristics of inflammatory bowel disease unclassified, Crohn’s disease and ulcerative colitis patients at diagnosis from the total Veszprem inflammatory bowel disease cohort, n (%)

	IBD-U (n = 119)	UC (n = 1370)	CD (n = 946)	P value
Male gender	55 (46.2)	702 (51.2)	496 (52.4)	0.032
Median age at diagnosis (IQR), years	34 (24-47.5)	36 (26-51)	28 (22-40)	0.042
Colonic extent at diagnosis			N/A	0.002
Proctitis	9 (7.6)	333 (24.3)
Left-sided colitis	43 (36.1)	664 (48.5)
Pancolitis	67 (56.3)	373 (27.2)
Smoking				0.001
Non-smoker	64 (53.8)	921 (67.2)	434 (45.9)
Active smoker	32 (26.9)	201 (14.7)	409 (43.2)
Ex-smoker	23 (19.3)	248 (18.1)	103 (10.9)
Diagnostic delay from symptom onset to diagnosis				0.089
Less than 1 year	80 (67.2)	962 (70.2)	562 (59.4)
1-2 years	29 (24.4)	282 (20.6)	262 (27.7)
More than 2 years	10 (8.4)	126 (9.2)	122 (12.9)

IBD-U: Inflammatory bowel disease unclassified; CD: Crohn’s disease; UC: Ulcerative colitis; IQR: Interquartile range; N/A: Not applicable.