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This study investigated the noninferiority and validity of an intensive speech treatment for people with Parkinson's disease (PD) delivered via telerehabilitation to the home. The effect of location on online delivery was also investigated.

In this single-blinded, randomized controlled noninferiority trial, 31 participants with dysarthria associated with PD from a metropolitan area were randomly assigned to either face-to-face or online Lee Silverman Voice Treatment (LSVT LOUD). A cohort of 21 participants from nonmetropolitan areas was also recruited and treated online. Outcomes were assessed using acoustic, perceptual, and quality of life measures.

Noninferiority of online treatment was confirmed through comparable clinical and quality of life outcomes for the metropolitan online and face-to-face treatment groups. Significant improvements posttreatment were achieved for several acoustic …