Functionality and disease severity in spinocerebellar ataxias

Area of Science:

• Neurology
• Neuroscience
• Rehabilitation Medicine

Background:

• Spinocerebellar ataxias (SCAs) are progressive neurodegenerative diseases impacting balance and function.
• Current clinical markers lack established links to functional/balance scores for rehabilitation guidance.

Purpose of the Study:

• To correlate functional scales with ataxia severity.
• Identify cutoff points for functional decline.
• Estimate Scale for Assessment and Rating of Ataxia (SARA) scores related to fall risk on the Berg Balance Scale (BBS).

Main Methods:

• Assessed 89 patients with molecularly diagnosed SCAs (SCA2 and SCA3).
• Evaluated functionality using Functional Independence Measure-Activities of Daily Living (FIM-ADL) and Lawton Instrumental Activities of Daily Living (Lawton-IADL).
• Measured balance with Berg Balance Scale (BBS) and disease severity with Scale for Assessment and Rating of Ataxia (SARA).

Main Results:

• Need for FIM-ADL supervision begins at SARA 12; Lawton-IADL supervision at SARA 14.
• Full dependence on FIM/Lawton items observed at SARA 20.
• Locomotion (FIM-ADL) and means of transport (Lawton-IADL) most impacted independence.
• Mean SARA scores for BBS fall risk: low (9.9), medium (17.4), high (25.2).

Conclusions:

• Correlation analysis between ataxia severity and functional scales provides crucial insights.
• This understanding can guide the management of functional dependence progression in SCAs.