Table 1.

Demographics of Olmsted County Inflammatory Bowel Disease cohort (1970 – 2011) and subset exposed to immunosuppression

	Entire Cohort (N = 937)			Cohort on Immunosuppressive Therapy (N = 573)
	CD (N = 427)	UC (N = 510)	Combined	CD (N = 307)	UC (N = 266)	Combined
Female, n (%)	221 (52.8%)	220 (43.1%)	441 (47.1%)	160 (52.1%)	115 (43.2%)	275 (48.0%)
Age (years), median (IQR)	29.5 (21.2, 46.6)	35 (24.8, 48)	32.8 (23.7, 47.4)	27.9 (20.5, 42.1)	34.2 (24.2, 48.3)	30.8 (22.3, 46.0)
White race	412 (96.5%)	487 (95.5%)	899 (95.9%)	296 (96.4%)	259 (97.4%)	555 (96.9%)
Follow up (years), median (IQR)	14.3 (7.9, 24.1)	15.3 (7.8, 25.8)	14.8 (7.9, 25)	14.6 (8.2, 24.7)	14.4 (8.3, 23.2)	14.5 (8.3, 23.9)

CD, Crohn’s disease; UC, Ulcerative colitis; IQR, Interquartile range