4.4 Article

Demographics, clinical characteristics, and prognostic factors of amyotrophic lateral sclerosis in Midwest

期刊

MUSCLE & NERVE
卷 65, 期 2, 页码 217-224

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WILEY
DOI: 10.1002/mus.27450

关键词

amyotrophic lateral sclerosis; epidemiology; prognostic factors; retrospective cohort study; survival analysis

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This retrospective cohort study aimed to explore the characteristics of patients with ALS in the Midwest. The study found that older age at onset and more frequent bulbar onset were prominent features among ALS patients in the Midwest. Furthermore, the study highlighted the need for prospective cohort studies with more clinical and functional data to better characterize ALS in the Midwest, veterans, and non-clinic populations, and to optimize care.
Introduction/Aims The Midwest has the highest regional prevalence of self-reported amyotrophic lateral sclerosis (ALS) in the United States, but with limited epidemiological studies. We aimed to explore the characteristics of patients with ALS in the Midwest. Methods This was a retrospective cohort study of participants with ALS deceased between January, 2010, and September, 2020, registered with the ALS Association Mid-America Chapter. Demographics and clinical variables included gender, race/ethnicity, military status, site of onset, interventions (gastrostomy, non-invasive ventilation, tracheostomy), and visits to ALS Association-registered clinics. Disease characteristics were compared to the National ALS Registry, and survival analysis was performed followed by sample augmentation with historical data to estimate survival with hypothetical censoring. Results The database included 1447 participants with a mean age at diagnosis of 65.7 +/- 11.9 y (>60 y at diagnosis: 72%). The median survival from symptom onset was 28.0 mo (95% confidence limit: 26.3, 29.7); sample augmentation increased this to 41.0 mo (38.5, 43.5). Bulbar onset disease and older age at diagnosis were associated with shorter survival. Participants not followed in ALS-Association registered clinics were more frequently male, had familial onset and tracheostomy. Veterans (N = 298) were older at diagnosis but had similar survival after adjustment for age. Discussions Our cohort had an older age at onset and more frequent bulbar onset than the National ALS Registry, perhaps reflecting ascertainment biases in each registry. Prospective cohort studies with more clinical and functional data are needed to better characterize ALS in Midwest, veterans, and non-clinic populations, and to optimize care.

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