A new Chinese crow's feet grading scale based on the DermaTOP system

Area of Science:

• Dermatology
• Cosmetic Science
• Biometrics

Background:

• Existing wrinkle assessment scales often lack cultural specificity for Chinese populations.
• There is a need for a validated, culturally relevant grading scale for crow's feet wrinkles in Chinese individuals.

Purpose of the Study:

• To develop and validate a novel crow's feet grading scale specifically for Chinese individuals.

Main Methods:

• Utilized the DermaTOP system to collect objective data from 608 healthy Chinese subjects.
• Employed exploratory factor analysis (EFA) to identify key dimensions of wrinkle data.
• Developed a computational formula and grading map based on EFA results and validated through expert assessment and objective calculations.

Main Results:

• A three-factor structure was identified via EFA, explaining 89.551% of the variance.
• A stable and validated Chinese crow's feet (CCF) grading scale was successfully developed.
• The scale comprises a parameter, grading map, and descriptive text for comprehensive assessment.

Conclusions:

• The developed CCF grading scale is a reliable and objective tool for evaluating crow's feet wrinkles in Chinese populations.
• This scale can be effectively used to assess the efficacy of cosmetic products and therapeutic interventions.
• The data-driven approach to scale development offers a potential model for future wrinkle assessment tool creation.