Prevalence of- and risk factors for work disability in Dutch patients with inflammatory bowel disease

Table 2 Demographic and clinical characteristics in patients with Crohn’s disease and ulcerative colitis n (%)

	CD	UC	P value
n	1740	1054
Sex (female)	1103 (63)	561 (53)	< 0.01
Median age, yr, (IQR 25-75)	39.9 (30-51)	43.4 (33-53)	< 0.01
Median age diagnosis, yr, (IQR 25-75)	24.1 (19-32)	29.0 (22-39)	< 0.01
Median age disease duration, yr, (IQR 25-75)	11.7 (6-21)	10.3 (5-18)	< 0.01
Family history of IBD1	518 (30)	266 (25)	0.01
Appendectomy1	266 (15)	70 (7)	< 0.01
Smoking	1620 (100)	984 (100)
Yes	439 (27)	117 (12)	< 0.01
Disease location
L1: ileal disease2	324 (22)
L2: colon disease2	450 (31)
L3: ileocolon disease2	696 (47)
L4: upper GI disease1	156 (9)
P: peri-anal disease1	485 (28)
E1: proctitis3		77 (8)
E2: left-sided colitis3		315 (34)
E3: extensive colitis3		541 (58)
Disease behavior CD
Fistulising disease1	289 (17)
Penetrating disease1	232 (13)
Stricturing disease1	445 (26)
Education	1708 (100)	1036 (100)
Low	932 (55)	517 (50)	0.02
Employment status
Full-time	607 (35)	440 (42)	< 0.01
Part-time	359 (21)	224 (21)
Partially disabled to work	129 (7)	54 (5)
Fully disabled to work	342 (20)	124 (12)
Sick leave	77 (4)	36 (3)
Retired	22 (1.3)	21 (2)
Other	204 (12)	155 (15)

¹Missing values were scored as non-present;

²These percentages are calculated for 1470 patients with CD;

³These percentages are calculated for 993 patients with UC. CD: Crohn’s disease; UC: Ulcerative colitis.