Costs and Treatment Patterns Among Patients with Atopic Dermatitis Using Advanced Therapies in the United States: Analysis of a Retrospective Claims Database

Introduction: For many, atopic dermatitis (AD) is not adequately controlled with topical regimens. This analysis examined treatment using advanced therapies and associated costs.

Methods: The IQVIA Health Plan Claims data set was analyzed. Patients aged ≥ 12 years with AD who newly initiated advanced therapy after the availability of dupilumab (March 28, 2017) and had ≥ 6 months continuous enrollment before and after their first advanced therapy claim (index date) were included. Advanced therapies included dupilumab, systemic corticosteroids (SCSs), systemic immunosuppressants (SISs), and phototherapy. A multivariate regression model was used to predict annualized follow-up healthcare costs.

Results: In total, 1980 patients were included (61.1% female; mean age, 41.2 years [SD, 17.4]; 11.3% < 18 years). Pre-index date, 65.2% of patients used topical corticosteroids (TCSs; 40.7% and 32.1% used medium and high potency, respectively). The most common advanced therapy was SCSs (N = 1453 [73.4%]; 69.2% prednisone) followed by dupilumab (N = 265 [13.4%]), SISs (N = 99 [5.0%]; 47.5% methotrexate), and phototherapy (N = 163 [8.2%]). Of patients treated with dupilumab, SISs, and phototherapy, 17.4%, 26.3%, and 14.1%, respectively, were prescribed SCSs post-index date. Overall, 62.6% of patients initiating SCSs, 49.1% initiating dupilumab, 64.6% initiating SISs, and 36.2% initiating phototherapy were prescribed TCSs post-index date. Mean annualized total costs (SD) post-index date were $20,722 ($47,014): $11,196 ($41,549) in medical costs ($7973 [$35,133] in outpatient visit costs) and $9526 ($21,612) in pharmacy costs. Mean annualized total cost (SD) varied significantly (P < 0.05) by index treatment: dupilumab, $36,505 ($14,028); SCSs, $17,924 ($49,019); SISs, $24,762 ($47,583); phototherapy, and $17,549 ($57,238).

Conclusions: Switching to combination therapy with SCSs and TCSs was common within 6 months of initiating advanced therapy in patients with AD. Patients also incurred significant pharmacy and outpatient costs. These results highlight the difficulty of managing AD with these existing treatment options.