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Assessing the reliability of the Modified Wash Test
M Guarrera1, P P Cardo, A Rebora
1Department of Endocrinological and Medical Sciences (DISEM), Section of Dermatology, University of Genoa, Genoa, Italy.
Summary
The modified wash test (MWT) reliably diagnoses and assesses the severity of androgenetic alopecia (AGA) and telogen effluvium (TE) using simple, non-invasive methods. This test helps differentiate between AGA and TE, identify combined cases, and guide treatment priorities.
Area of Science:
- Dermatology
- Trichology
Background:
- Androgenetic alopecia (AGA) and telogen effluvium (TE) are common hair loss conditions requiring reliable diagnostic tools.
- Accurate assessment of diagnosis and severity is crucial for effective treatment planning.
Purpose of the Study:
- To establish a simple, reliable method for evaluating the diagnosis and severity of androgenetic alopecia (AGA) and telogen effluvium (TE).
Main Methods:
- The modified wash test (MWT) was employed, assessing shed hair count and vellus hair percentage.
- Twenty-five subjects underwent weekly MWT for four consecutive weeks.
- Intraclass correlation coefficient and ROC curves were utilized for reliability analysis.
Main Results:
- The MWT demonstrated high reliability in diagnosing AGA, TE, and normal hair status.
- Reliability was almost perfect for AGA (total and vellus hair percentage) and TE (vellus hair count).
- ROC curves indicated sensitivity and specificity ranging from 50% to 100%.
Conclusions:
- The modified wash test is a simple, non-invasive, and cost-effective tool for clinical use.
- MWT effectively distinguishes between TE and AGA, identifies mixed conditions, and aids in prioritizing treatment.
- The test provides reliable data for assessing hair loss severity and guiding therapeutic decisions.
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