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Development and Validation of a Clinical Scale for the Evaluation of Forearm Skin Photoaging
C O Z Guimarães1, E Bagatin2, L R S Guadanhim2
1Dermatology Department, Federal University of São Paulo, São Paulo, SP, Brazil carolzerbini@hotmail.com.
Background:
Despite the focus on facial photoaging ratings, there are few classifications developed for forearm skin aging assessment.
Objective:
To develop and validate a clinical scale for the evaluation of forearm skin aging.
Methods:
Three clinical dermatology faculty members selected, discussed, and appraised the main signs of forearm photoaging. The validation of the resulting scale was performed by 5 assessors who were previously trained to classify 102 photographs of forearms with different degrees of aging. Retests were performed in 15 days.
Results:
There was significant correlation between the selected variables and the subjective global aging scale. The developed scale showed high internal consistency (Cronbach's α=0.87) and high correlation with the global photoaging scale (rho=0.92). Inter- and intraobserver final scores showed high agreement.
Conclusion:
A validated clinical photoaging scale for forearms with internal consistency, reliability, and validity was developed.
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