Listener effort quantifies clinically meaningful progression of dysarthria in people living with amyotrophic lateral sclerosis
Navar Bingham, I.; Norel, R.; Roitberg, E. G.; Peller, J.; Trevisan, M.; Agurto, C.; Shalom, D. E.; Aguirre, F.; Embon, I.; Taitz, A.; Harris, D.; Wright, A.; Seaver, K.; Sullivan, S.; Green, J. R.; Ostrow, L. W.; Fraenkel, E.; Berry, J. D.
Show abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative motor neuron disease that causes progressive muscle weakness. Progressive bulbar dysfunction causes dysarthria and thus social isolation, reducing quality of life. The Everything ALS Speech Study obtained longitudinal clinical information and speech recordings from 292 participants. In a subset of 120 participants, we measured speaking rate (SR) and listener effort (LE), a measure of dysarthria severity rated by speech pathologists from recordings. LE intra- and inter-rater reliability was very high (ICC 0.88 to 0.92). LE correlated with other measures of dysarthria at baseline. LE changed over time in participants with ALS (slope 0.77 pts/month; p<0.001) but not controls (slope 0.005 pts/month; p=0.807). The slope of LE progression was similar in all participants with ALS who had bulbar dysfunction at baseline, regardless of ALS site of onset. LE could be a remotely collected clinically meaningful clinical outcome assessment for ALS clinical trials.
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