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Objective and quantitative evaluation of scar color using the L*a*b* color coordinates
Young Woo Cheon1, Won Jai Lee, Dong Kyun Rah
1Department of Plastic and Reconstructive Surgery, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.
The Journal of Craniofacial Surgery
|May 21, 2010
Summary
Objective scar color assessment using L*a*b* color coordinates provides a reliable, quantitative measurement, moving beyond subjective clinical judgments for improved scar management evaluation.
Area of Science:
- Dermatology and Plastic Surgery
- Medical Imaging and Photodocumentation
- Colorimetry and Quantitative Analysis
Background:
- Traditional scar color evaluation relies on subjective physician judgments, limiting objective assessment.
- Need for a standardized, quantitative method to measure scar color accurately.
- Existing clinical scar assessment scales lack objective colorimetric data.
Purpose of the Study:
- To apply novel photographic analysis for objective, quantitative scar color measurement using L*a*b* color coordinates.
- To establish the reliability and consistency of this objective method.
- To correlate objective color measurements with subjective clinical scar classifications.
Main Methods:
- Photographic analysis of 207 scars evaluated by three plastic surgeons using the Beausang et al. scale.
- Subjective scar color classification into four groups: perfect match, slight, obvious, and gross mismatch.
- Objective quantification of scar color differences (DeltaL*, Deltaa*, Deltab*, DeltaT*) using L*a*b* coordinates, with repeated measurements for reliability.
Main Results:
- Significant differences in mean total color difference (DeltaT*) were observed across all subjective scar groups (P < 0.001).
- Objective color coordinates (DeltaL*, Deltaa*) differed significantly between groups, except between groups 1 and 2.
- High interrater reliability and test-retest consistency were demonstrated for the L*a*b* color coordinate measurements.
Conclusions:
- Objective scar evaluation using L*a*b* color coordinates is a reliable method for quantifying scar color.
- This quantitative approach offers a significant advancement over subjective scar assessment.
- The method shows potential for simple and effective evaluation of scar management outcomes with further research.
