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Original Research

Incidence and Prevalence of Inflammatory Bowel Disease in Norway and the Impact of Different Case Definitions: A Nationwide Registry Study

ORCID Icon, , , &
Pages 287-294 | Published online: 23 Apr 2021

Figures & data

Figure 1 IBD incidence according to our base case definition: At least one IBD visit and two IBD prescriptions or two IBD visits. Patients were removed if they had received an IBD prescription more than 60 days prior to their first IBD visit.

Figure 1 IBD incidence according to our base case definition: At least one IBD visit and two IBD prescriptions or two IBD visits. Patients were removed if they had received an IBD prescription more than 60 days prior to their first IBD visit.

Figure 2 The incidence of IBD for patients with at least two records in the Norwegian Patient Registry (not utilizing prescription data).

Figure 2 The incidence of IBD for patients with at least two records in the Norwegian Patient Registry (not utilizing prescription data).

Figure 3 The incidence of IBD for patients with at least two records in the Norwegian Patient Registry. Patients were removed if they had received an IBD prescription more than 60 days prior to their first IBD visit.

Figure 3 The incidence of IBD for patients with at least two records in the Norwegian Patient Registry. Patients were removed if they had received an IBD prescription more than 60 days prior to their first IBD visit.

Figure 4 CD incidence in 2017 according to different case definitions. *Base case definition.

Figure 4 CD incidence in 2017 according to different case definitions. *Base case definition.

Figure 5 UC incidence in 2017 according to different case definitions. *Base case definition.

Figure 5 UC incidence in 2017 according to different case definitions. *Base case definition.

Figure 6 IBD prevalence according to our base case definition: At least one IBD visit and two IBD prescriptions or two IBD visits.

Figure 6 IBD prevalence according to our base case definition: At least one IBD visit and two IBD prescriptions or two IBD visits.

Figure 7 CD prevalence in 2017 according to different case definitions. Actively treated was defined as one or more IBD visits in 2017 and at least one prescription of IBD-related drugs in 2017. *Base case definition.

Figure 7 CD prevalence in 2017 according to different case definitions. Actively treated was defined as one or more IBD visits in 2017 and at least one prescription of IBD-related drugs in 2017. *Base case definition.

Figure 8 UC prevalence in 2017 according to different case definitions. Actively treated was defined as one or more IBD visits in 2017 and at least one prescription of IBD-related drugs in 2017. *Base case definition.

Figure 8 UC prevalence in 2017 according to different case definitions. Actively treated was defined as one or more IBD visits in 2017 and at least one prescription of IBD-related drugs in 2017. *Base case definition.