SARA captures disparate progression and responsiveness in spinocerebellar ataxias - Sorbonne Université Access content directly
Journal Articles Journal of Neurology Year : 2024

SARA captures disparate progression and responsiveness in spinocerebellar ataxias

Stefan Pulst
  • Function : Author


Background: The Scale for Assessment and Rating of Ataxia (SARA) is a widely used clinical scale to assess cerebellar ataxia but faces some criticisms about the relevancy of all its items. Objectives: To prepare for future clinical trials, we analyzed the progression of SARA and its items in several polyQ spinocerebellar ataxias (SCA) from various cohorts. Methods: We included data from patients with SCA1, SCA2, SCA3, and SCA6 from four cohorts (EUROSCA, RISCA, CRC-SCA, and SPATAX) for a total of 850 carriers and 3431 observations. Longitudinal progression of the SARA and its items was measured. Cohort, stage and genetic effects were tested. We looked at the respective contribution of each item to the total scale. Sensitivity to change of the scale and the impact of item removal was evaluated by calculating sample sizes needed in various scenarios. Results: Longitudinal progression was significantly different between cohorts in SCA1, SCA2 and SCA3, the EUROSCA cohort having the fastest progression. Advanced stage patient were progressing slower in SCA2 and SCA6. Items were not contributing equally to the full scale through ataxia severity: gait, stance, hand-movement, and heel-shin contributed the most in early stage, and finger-chase, nose-finger, and sitting in later stages. Few items drove the sensitivity to change of SARA, but changes in the scale structure could not improve its sensitivity in all populations. Conclusion: SARA and its items progression pace showed high heterogeneity across cohorts and SCAs. However, no combinations of items improved the responsiveness in all SCAs or populations taken separately.
Fichier principal
Vignette du fichier
SARA captures disparate progression_JOON_HAL.pdf (990.42 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04607900 , version 1 (11-06-2024)



Emilien Petit, Tanja Schmitz-Hübsch, Giulia Coarelli, Heike Jacobi, Anna Heinzmann, et al.. SARA captures disparate progression and responsiveness in spinocerebellar ataxias. Journal of Neurology, 2024, ⟨10.1007/s00415-024-12475-1⟩. ⟨hal-04607900⟩
0 View
0 Download



Gmail Mastodon Facebook X LinkedIn More