Comparison of Severity Assessment Methods in Generalized Pustular Psoriasis: A Single-Center Study.

Area of Science:

• Dermatology
• Rheumatology
• Internal Medicine

Background:

• Generalized pustular psoriasis (GPP) is a severe autoinflammatory skin disease requiring accurate severity assessment for management.
• Existing scoring systems like GPPGA, GPPASI, and IGA have limitations in comprehensively evaluating GPP.
• The Japanese Dermatological Association (JDA) score incorporates both cutaneous and systemic inflammatory markers.

Purpose of the Study:

• To compare the efficacy of the JDA score against GPPGA, GPPASI, and IGA in assessing GPP severity.
• To investigate the correlation between these scoring systems and the length of patient hospitalization.
• To evaluate the role of systemic inflammatory markers (CRP, albumin) in GPP severity assessment.

Main Methods:

• Retrospective analysis of 23 hospitalizations from 13 GPP patients treated between 2014 and 2024.
• Comparison of JDA score, GPPGA, GPPASI, and IGA with hospitalization duration.
• Correlation analysis of CRP, albumin levels, and CRP/albumin ratio with clinical outcomes and scoring systems.

Main Results:

• The JDA score demonstrated a significant positive correlation with hospitalization length (r=0.482, p=0.023).
• GPPGA, GPPASI, and IGA scores did not show significant correlation with hospitalization length.
• CRP and albumin levels, along with their ratio, correlated significantly with hospitalization length and GPPGA/GPPASI scores.

Conclusions:

• The JDA score offers a more comprehensive and clinically relevant assessment of GPP severity by integrating cutaneous and systemic factors.
• Serum CRP and albumin levels are valuable indicators for evaluating GPP activity and predicting clinical outcomes.
• The JDA score's correlation with hospitalization length highlights its utility in managing GPP patients.