Prediction of Stroke Outcomes in a Super-aged Society: Different Effects Among Predictive Variables

Area of Science:

• Gerontology
• Neurology
• Rehabilitation Medicine

Background:

• Global population aging presents unique challenges for healthcare, particularly in stroke recovery.
• Age is a known factor influencing stroke outcomes, but its specific impact in the very old is less understood.

Purpose of the Study:

• To determine if the effect of age on functional independence after stroke differs between younger (<75 years) and older (≥75 years) patient groups.
• To inform age-specific prognostic models and rehabilitation strategies for post-stroke care.

Main Methods:

• Retrospective cohort study of 169 post-stroke patients (independent pre-stroke) undergoing intensive rehabilitation.
• Functional Independence Measure (FIM) motor score at discharge was the primary outcome.
• Analysis included multivariable linear regression, comparing patients <75 years ('early elderly') and ≥75 years ('late elderly').

Main Results:

• The 'late elderly' group had poorer baseline FIM motor, cognitive scores, and trunk function, but similar FIM gains compared to the 'early elderly'.
• In the overall cohort, age, time to transfer, admission FIM cognitive score, and trunk function predicted discharge FIM motor score.
• Age was not a significant predictor in the <75 group, but was a strong predictor in the ≥75 group.

Conclusions:

• The prognostic value of age in post-stroke rehabilitation varies significantly between age groups.
• Age is a critical independent predictor of functional outcomes for patients aged ≥75 years, but not for those <75 years.
• Tailored prognostic models and rehabilitation plans are essential for older adults to optimize functional independence after stroke.