Treatment Pathways in Patients With Crohn's Disease and Ulcerative Colitis: Understanding the Road to Advanced Therapy.

Background: Patients with Crohn's disease (CD) or ulcerative colitis (UC) often cycle through conventional therapies (CT) with different mechanisms of action (MOA) before initiating advanced therapy (AT). We describe treatment patterns among patients with CD/UC.

Methods: Using Merative MarketScan Research databases, adult patients with CD/UC were identified from medical/pharmacy claims (2017-2021). Patients had ≥1 hospitalization or ≥2 outpatient visits (≥30 days apart within 1 year) for CD/UC. Two cohorts were established; cohort 1: Newly diagnosed patients (index date is the date of first diagnosis) and cohort 2: Patients initiating AT (index date is the date of first AT). First-line treatment patterns (cohort 1) and CT pathways before AT initiation (cohort 2) by the number of episodes (ie, adding a new therapy, switching to another therapy, or restarting the same therapy after ≥60 days) and MOA are reported.

Results: Among newly diagnosed patients in cohort 1 (CD: n = 1739; UC: n = 2740), 14.4% (CD) and 5.9% (UC) of patients had any AT use during the follow-up period (mean: 2.3 years; ≥ 77% initiated corticosteroids). Among patients in cohort 2 (CD: n = 2594; UC: n = 2431), the mean number of CT episodes before AT initiation was 4.0 ± 4.3 (CD) and 5.9 ± 5.0 (UC). Among those with ≥1 corticosteroid episode (CD: 82.2%; UC: 91.5%), the mean number of episodes was 4.6 ± 4.3 (CD) and 6.3 ± 5.0 (UC). Overall, 13.3% (CD) and 23.7% (UC) of patients cycled through 3 MOAs before AT initiation.

Conclusions: Despite treatment recommendations, few newly diagnosed CD/UC patients initiated AT as their first treatment. Moreover, patients cycled through multiple CTs before initiating AT.