FIG. 2.

Three‐year effect sizes of assessment metrics in preHD populations from the Cooperative Huntington's Observational Research Trial. cUHDRS, composite Unified Huntington's Disease Rating Scale; PIN, prognostic index; preHD, prediagnosis Huntington's disease; SDMT, Symbol Digit Modalities Test; Stroop‐C, Stroop Color and Word Test (color condition); Stroop‐I, Stroop Color and Word Test (interference condition); Stroop‐W, Stroop Color and Word Test (word condition); TFC, total functional capacity; TMS, total motor score.