A Modified Progressive Supranuclear Palsy Rating Scale for Virtual Assessments

Background The reliability of the Progressive Supranuclear Palsy Rating Scale (PSPRS) using teleneurology has not been assessed. Objectives To test whether removing items inadequately assessed by video would impact measurement of PSP severity and progression. Methods We performed secondary analyses of two data sets: the phase 2/3 trial of Davunetide in PSP and a large single‐center cohort. We examined two modifications of the PSPRS: (1) removing neck rigidity, limb rigidity, and postural stability (25 items; mPSPRS‐25) and (2) also removing three ocular motor items and limb dystonia (21 items; mPSPRS‐21). Proportional agreement relative to the possible total scores was measured using the intraclass correlation coefficient, compared to the original PSPRS baseline values and change over 6 and 12 months. We examined the ability of both scales to predict survival in the single‐center cohort using proportional hazards models. Results The mPSPRS‐25 showed excellent agreement (0.99; P