UHDRS: Unified Huntington's Disease Rating Scale

The Unified Huntington's Disease Rating Scale (UHDRS) is the comprehensive, multidomain assessment instrument for Huntington's disease, a neurodegenerative disorder caused by expanded CAG trinucleotide repeats. Developed by the Huntington Study Group in 1996, the UHDRS measures motor, cognitive, functional, and psychiatric manifestations of disease. The UHDRS is the gold-standard outcome measure in Huntington's disease clinical trials and longitudinal natural history studies.