Inequalities in access to medication for atopic dermatitis and alopecia areata in Germany: A mixed-methods study

Objectives: To describe and explain healthcare disparities in adult patients with AD and/or AA in Germany with a special focus on medication, and to deduce recommendations for action.
Methods: Part 1: claims data: nationwide data-on-file from the statutory health insurance DAK-G including 2.2 million insured people in 2016-2019; billing-relevant information from outpatient and inpatient care.
Part 2: survey data: nationwide data-on-file from the AtopicHealth study conducted in 2017-2019; patient- and clinician-reported data, such as patient characteristics, information on health care; patient-reported outcomes.
Part 3: qualitative study: in-depth interviews with patients with AD, patients with AA, and dermatologists using pilot-tested, semi-structured interview guidelines.