A Segmental Approach to Scoring Hair Density from Global Images: Introducing the Scalp Coverage Scoring Method for Clinical Trials and Practice

hair fiber formation. 5Indeed, miscategorization of hair loss can hinder the proper clinical assessment of known or novel treatments for pattern hair loss.At the turn of the 21 st century, objective records with standardized global photographic approaches became a significant part of drug efficacy trials for patterned hair loss. 6,7However, during test-retest scoring of the severity of patterns on printed photographs, experienced clinicians reported a lack of reproducibility of the commonly used Hamilton-Ludwig scales. 8Finally, a 5-point scale was proposed for staging hair loss in females implementing the Venning