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Primary lateral sclerosis: predicting functional outcome.

Vânia Almeida¹, Mamede de Carvalho, Manuel Scotto

¹Department of Neurosciences, Hospital de Santa Maria-CHLN, Av. Prof. Egas Moniz, Lisbon, Portugal.

Amyotrophic Lateral Sclerosis & Frontotemporal Degeneration

|September 11, 2012

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Age at symptom onset is the primary predictor of faster functional decline in patients with primary lateral sclerosis (PLS). Older age indicates a poorer prognosis for functional outcomes in PLS.

Area of Science:

Neurology
Neurodegenerative Diseases
Clinical Outcomes

Background:

Primary Lateral Sclerosis (PLS) is a rare, adult-onset motor neuron disease.
Understanding prognostic factors is crucial for managing PLS and patient counseling.

Purpose of the Study:

To investigate functional outcomes in a cohort of primary lateral sclerosis patients.
To identify prognostic factors influencing the rate of functional impairment in PLS.

Main Methods:

A longitudinal study of 24 PLS patients.
Clinical assessments included ALSFRS, respiratory function, and neurophysiological tests (EMG, TMS).
Cox proportional hazard model used to evaluate prognostic factors for functional decline.

Main Results:

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Older age at symptom onset was significantly associated with more rapid functional impairment (p=0.019).
Gender, respiratory function (FVC), onset region, and neurophysiological findings did not predict outcome.
Median disease duration was 9.9 years, with a median follow-up of 4.6 years.

Conclusions:

Age at onset is the most critical prognostic factor for functional outcomes in primary lateral sclerosis.
This finding aids in predicting disease progression and informing patient care strategies.