This study is to assess the burden of disease in adolescent and adult participants with moderate or severe alopecia areata (AA), non-segmental vitiligo (NSV), or moderate to severe hidradenitis suppurativa (HS) in a large global real-world participant population.
Participants with Physician-confirmed diagnosis of non-segmental vitiligo (NSV), moderate to severe Alopecia Areata (AA), or moderate to severe hidradenitis suppurativa (HS)
Participants Ability to understand study questionnaires, with caregiver support as required for adolescents
Participating in interventional clinical trial(s) at time of study visit (participation in another non-interventional study or registry does not exclude a participant from this study)
Unable or unwilling to comply with study requirements and PRO collection
Adolescent and Adult Participants with Alopecia Areata, Vitiligo, or Hidradenitis Suppurativa in Real-World will undergo a single-visit data collection per routine clinical practice.
Case-only
Cross-sectional
Not listed
Alopecia Areata (AA) symptoms affecting quality of life and daily functioning, assessed by the Alopecia Areata Symptom Impact Scale (AASIS) AA only
AASIS- is a scale assessing the severity of AA-related symptoms on daily functioning. Each item scored on a 0-10 Likert scale, where 0 = not present and 10 = as bad as you can imagine Higher total score = greater impact
Measuring scalp hair loss, assessed by the Severity of Alopecia Tool (SALT) score. AA only
SALT is a Tool developed to quantify AA-related hair loss Total score of 0-100, with 0 = no hair loss, and 100 = complete hair loss
Measuring facial skin depigmentation, assessed by the Facial Vitiligo Area Scoring Index (F-VASI) Vitiligo Only
F-VASI is a quantitative scoring tool used to evaluate the extent and severity of facial vitiligo calculated by multiplying the degree of skin depigmentation of the face
Vitiligo Quality of Life (QOL), assessed by Vitiligo Quality of Life Score (VitiQoL) Vitiligo Only
VitiQoL is a 16-item instrument assessing impact of vitiligo on QoL. 15 items are scored on a 7-point Likert scale, ranging from "not at all" to "all the time". An additional item (not contributing to total score) assesses current severity of condition on a 7-point scale ranging from "no skin involvement" to "most severe case"
