OBJECTIVE: To investigate how respiratory dysfunction and site of onset influences changes in sleep architecture in people with ALS (pwALS). METHODS: We conducted a retrospective observational study, analyzing demographic data, lung function tests, and polysomnography (PSG) measures. Descriptive statistics, correlation analyses, and survival analyses were performed. RESULTS: = 0.0059). Spinal onset, a slower rate of FVC decline in the months preceding PSG and a preserved FVC (≥ 70%) at the time of PSG were associated with improved survival. CONCLUSION: We observed substantial sleep disturbances in our cohort overall with substantially increased arousals in the spinal group. FVC is a significant predictor for sleep efficiency and the decline in FVC is linked to survival.
Bracaval et al. (2026) studied this question.