Table 1.

Baseline Characteristics of the 277 Participants Based on Information from the NPR

First NPR Diagnosis	IBD N=277 N(%)	CD N=61 N(%)	UC N=216 N(%)
Sex
Female	156 (56)	38 (62)	118 (55)
Male	121 (44)	23 (38)	98 (45)
Age at diagnosisa
Median [Q1 + Q3]  Range		68 [64, 72] 57, 79	69 [64, 72] 53, 82
Patients with diagnostic codes referring to specific location in the gastrointestinal tractb	126 (46)	19 (31)	108 (50)

Notes: ^aAge is missing from three patients. ^bK50.0, K50.0D, K50.1. K51.0, K51.1, K51.2, K51.2A, K51.3, K51.5, K518A.

Abbreviations: NPR, the Danish National Patient Registry; IBD, inflammatory bowel disease; CD, Crohn’s disease; UC, ulcerative colitis.