Skin-Related Quality of Life During Autoimmune Bullous Disease Course

Area of Science:

• Dermatology
• Immunology
• Quality of Life Research

Background:

• Autoimmune bullous diseases (AIBDs) are chronic conditions causing significant morbidity.
• Skin-related quality of life (SRQL) assessment is crucial for understanding AIBD impact.
• Disease severity and flares in AIBDs are challenging to quantify, necessitating reliable measurement tools.

Purpose of the Study:

• To evaluate the Skindex-16 score's utility in measuring SRQL across AIBD subtypes.
• To assess Skindex-16 performance in both flare and non-flare states.
• To determine the construct validity of the Skindex-16 in AIBD patients.

Main Methods:

• Retrospective cross-sectional study of 192 patients with pemphigoid, pemphigus, dermatitis herpetiformis, and linear immunoglobulin A disease.
• Collected Skindex-16 scores, self-reported flare status, and relevant clinical data.
• Analyzed Skindex-16 domain scores for validity using correlation analyses and confirmatory factor analysis (CFA).

Main Results:

• Skindex-16 domain scores were significantly higher in flare states across all AIBD subtypes compared to non-flare states.
• The Skindex-16 demonstrated good internal consistency (Cronbach α > 0.80) and convergent validity with patient-reported outcomes.
• Poorer SRQL was noted during non-flare periods for pemphigoid and dermatitis herpetiformis compared to pemphigus.

Conclusions:

• SRQL, measured by Skindex-16, is strongly associated with disease activity in AIBDs.
• The Skindex-16 is a valid tool for assessing SRQL in AIBD patients, providing critical disease severity information.
• Residual SRQL morbidity exists even in non-flare states, particularly in pemphigoid and dermatitis herpetiformis.