The Kesty Hyperpigmentation Scale: A Study to Validate a New Tool for Assessing Facial Hyperpigmentation

Abstract

Background

Facial hyperpigmentation due to sun damage, post-inflammatory hyperpigmentation, and other factors is a common complaint of patients. While lasers and topical treatments are frequently used to manage hyperpigmentation, a standardized way of measuring response to treatment is difficult.

Aims

The Kesty Hyperpigmentation Scale (KHS) is a novel clinical instrument created to provide a consistent approach for evaluating facial hyperpigmentation in both cosmetic dermatology and broader medical settings.

Methods

This study introduces the KHS, describes the process of its creation and validation, and examines its practical uses in clinical settings. Statistical analysis included Gwet's AC2, Kendall's W, Spearman's ρ/rho, weighted Cohen's kappa, and Bland–Altman analysis.

Results

The findings of the statistical analysis included high ordinal agreement, strong rank concordance, and minimal bias. This supports the conclusion that the novel rating approach is both reliable and valid for assessing skin hyperpigmentation on the given 0–3 scale. The KHS offers an objective framework to measure the severity of hyperpigmentation, helping clinicians track patient progress after cosmetic treatments, and fostering improved communication with patients. Participants in this study found the scale to be user-friendly, and the majority expressed interest in incorporating it into their practices to document patient conditions.

Conclusions

The KHS is an effective and user-friendly tool for evaluating facial hyperpigmentation, addressing a significant need within dermatology.