July 7, 2026 · Foot & ankle international · DOI: 10.1177/10711007261449247

Defining Radiographic Threshold Values for the Progressive Collapsing Foot Deformity Classification System: A Large-Cohort Diagnostic Study

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The authors aimed to establish definitive cut-off threshold values for radiographic measurements used in the Progressive Collapsing Foot Deformity (PCFD) classification system, which currently relies on subjective surgeon interpretation. By analyzing data from two large cohorts of PCFD patients and asymptomatic controls, they identified optimal cut-off values for various deformity classes, significantly enhancing the diagnostic reliability and clinical applicability of the PCFD classification. This study provides a foundation for improved clinical decision-making and future research in foot deformities.

Rebekah Belayneh, François Lintz, Nacime Salomão Barbachan Mansur, Grayson Talaski, Donald Anderson, Scott J Ellis, Cesar de Cesar Netto

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