Reviewing the development, evidence base, and application of the revised dengue case classification

Area of Science:

• Tropical Medicine
• Infectious Diseases
• Public Health

Background:

• The existing dengue classification (DF/DHF/DSS) has limitations, including complexity in clinical practice and misclassification of severe cases.
• Clinicians question the emphasis on hemorrhage over plasma leakage in severe dengue and the low sensitivity of the tourniquet test.

Purpose of the Study:

• To prospectively develop and validate an evidence-based dengue case classification system.
• To improve the accuracy, standardization, and clinical applicability of dengue diagnosis and management.

Main Methods:

• Systematic literature review to identify shortcomings of the existing DF/DHF/DSS classification.
• Analysis of global dengue guidelines and prospective cohort studies in multiple countries.
• Expert consensus meetings and field testing of a revised classification scheme.

Main Results:

• The DF/DHF/DSS classification shows difficulties in application, variability, and does not accurately reflect disease severity.
• A revised classification distinguishing dengue with warning signs and severe dengue demonstrated superior applicability and accuracy.
• Field testing in 18 countries favored the revised classification for standardizing management and improving patient care.

Conclusions:

• The revised dengue case classification provides a more accurate and practical tool for clinical management and public health.
• This evidence-based approach can serve as a model for developing other disease classification systems.
• Further studies are ongoing to refine predictive values for warning signs and diagnostic criteria.