Abstract
Background: Multiple clinician-reported outcome measures exist for atopic dermatitis (AD) severity. However, there is no gold standard for use in clinical practice. Objectives: To determine the measurement properties of the product of validated Investigator's Global Assessment for AD (vIGA) and body surface area (BSA) overall or divided into six categories (cBSA: 0%/0.1, <10%/10, <30%/30, <50%/50, <70%/70 and <90%/90–100%) and compare with other clinician-reported and patient-reported outcomes in adults and children with AD. Methods: We performed a prospective dermatology practice-based study using questionnaires and evaluation by a dermatologist (n = 653). Results: vIGA*BSA and vIGA*cBSA had good convergent validity with BSA (Spearman's ρ = 0.97 and 0.93), eczema area and severity index (ρ = 0.94 and 0.92), and objective SCORAD (ρ = 0.88 and 0.89); and weak-to-good convergent validity with Numeric Rating Scale average itch (ρ = 0.22 and 0.22) and worst itch (ρ = 0.27 and 0.28), Patient-Oriented Eczema Measure (ρ = 0.44 and 0.43), Dermatology Life Quality Index (ρ = 0.48 and 0.49), ItchyQOL (ρ = 0.45 and 0.46), PROMIS Sleep Disturbance (ρ = 0.46 and 0.37) and sleep-related impairment (ρ = 0.31 and 0.31) in adults and/or children; very good discriminant validity for physician-reported global AD severity; good responsiveness to change of severity of AD and itch; and good reliability (intraclass correlation coefficient [95% confidence interval]: 0.72 [0.60–0.81] and 0.74 [0.62–0.82]) with no floor or ceiling effects. Thresholds for interpretability bands and clinically important difference were established. Conclusions: vIGA*BSA and vIGA*cBSA scores showed good convergent and discriminant validity, reliability, responsiveness and interpretability in adults and children with AD, and were feasible for use in clinical practice. vIGA*BSA and vIGA*cBSA had slightly lower convergent validity than EASI or objective SCORAD, but might be more efficient to collect and score.
Original language | English (US) |
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Pages (from-to) | 180-187 |
Number of pages | 8 |
Journal | Journal of the European Academy of Dermatology and Venereology |
Volume | 35 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2021 |
Funding
This publication was made possible with support from the Agency for Healthcare Research and Quality (AHRQ), grant number K12 HS023011, the Dermatology Foundation, and a research grant from Galderma. Northwestern Medicine Enterprise Data Warehouse (NMEDW) was supported, in part, by the Northwestern University Clinical and Translational Science Institute, funded, in part, by Grant Number UL1TR000150 from the National Center for Advancing Translational Sciences, Clinical and Translational Sciences Award. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH. The Clinical and Translational Science Award (CTSA) is a registered trademark of DHHS. Northwestern Medicine Enterprise Data Warehouse (NMEDW) was supported, in part, by the Northwestern University Clinical and Translational Science Institute, funded, in part, by Grant Number UL1TR000150 from the National Center for Advancing Translational Sciences, Clinical and Translational Sciences Award. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH. The Clinical and Translational Science Award (CTSA) is a registered trademark of DHHS.
ASJC Scopus subject areas
- Dermatology
- Infectious Diseases