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Tracking bimanual recovery after stroke: Grasp function and stroke severity predict 1-year performance.

Annick Van Gils1,2, Yue Zou1, Sarah Meyer1,3

  • 1Department of Rehabilitation Sciences, KU Leuven - University of Leuven, Leuven, Belgium.

Clinical Rehabilitation
|October 31, 2025
PubMed
Summary

Bimanual performance significantly improves in the first six months after stroke. Early grasp function and stroke severity are key predictors of long-term bimanual outcomes for stroke survivors.

Keywords:
Strokebimanual performancelongitudinal studypredictionthe adult assisting hand assessment stroke

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Area of Science:

  • Neurology
  • Rehabilitation Medicine
  • Clinical Neuroscience

Background:

  • Stroke survivors often experience impaired bimanual performance, affecting daily activities.
  • Understanding the recovery trajectory and early predictors is crucial for effective rehabilitation.

Purpose of the Study:

  • To characterize the recovery pattern of bimanual performance post-stroke.
  • To identify early predictors of bimanual function at 6 and 12 months after stroke.

Main Methods:

  • A prospective longitudinal study design was employed.
  • Bimanual performance was assessed using the Adult Assisting Hand Assessment Stroke.
  • Multivariate linear regression and Chi-square Automatic Interaction Detection analysis were used to identify predictors.

Main Results:

  • Bimanual performance showed significant improvement over time, particularly within the first 6 months.
  • At 6 months, admission grasp function and stroke severity explained 73% of the variance in bimanual scores.
  • At 12 months, stroke severity, grasp function, and Barthel Index explained 78% of the variance.

Conclusions:

  • Bimanual function recovery is most substantial in the initial 6 months post-stroke.
  • Admission grasp function and stroke severity are strong predictors of long-term bimanual outcomes.
  • A derived decision tree may aid in stratified rehabilitation and goal setting for stroke patients.