Table 1.

Characteristics of the Study Cohort

Characteristic	N = 2,809 (%)
Median age (IQR) (in years)	46 (32 – 60)
Female	1,712 (61%)
Ulcerative colitis	1,244 (44%)
Median age at first IBD diagnosis code (IQR) (in years)	38 (27 – 52)
Ever biologic use	629 (22%)
Immunomodulator use	1,129 (40%)
IBD-related hospitalizations	1,135 (40%)
Bowel resection	453 (16%)
Race
White	2,444 (87%)
Black	213 (8%)
Other	152 (5%)
Median duration of follow-up (IQR)	11 (5 – 18)
Median plasma 25(OH)D level	26 (17 – 35)
Vitamin D status
Deficient	885 (32%)
Insufficient	807 (29%)
Normal	1,117 (40%)
Any cancer	196 (7%)
Metastatic cancer	72 (3%)

IQR – interquartile range;