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Pre-Stroke Frailty Is Independently Associated With Post-Stroke Cognition: A Cross-Sectional Study.

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Pre-stroke frailty is a significant risk factor for cognitive impairment after stroke, independent of other factors. This finding highlights frailty as a key predictor of cognitive decline following a stroke.

Keywords:
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Area of Science:

  • Neurology
  • Gerontology
  • Cognitive Science

Background:

  • Post-stroke cognitive impairment (PSCI) is a frequent complication following cerebrovascular events.
  • The underlying mechanisms and risk factors for PSCI remain incompletely understood.
  • Frailty, a state of increased vulnerability, is increasingly recognized as a potential contributor to adverse health outcomes, including cognitive decline.

Purpose of the Study:

  • To investigate the association between pre-stroke frailty and cognitive function in the acute phase following stroke.
  • To determine if pre-stroke frailty independently predicts post-stroke cognition, adjusting for established risk factors.

Main Methods:

  • A cohort of 154 acute stroke patients was studied.
  • Pre-stroke frailty was assessed using a Frailty Index (scores 0-100).
  • Acute cognition was measured using the Mini-Montreal Cognitive Assessment (scores 0-12).
  • Multiple linear regression analyses were performed, controlling for age, sex, stroke severity, stroke type, pre-stroke cognition, delirium, and prior stroke/TIA.

Main Results:

  • Pre-stroke frailty was significantly associated with lower scores on the Mini-Montreal Cognitive Assessment (Standardized Beta = -0.40, p < 0.001).
  • This association remained significant after adjusting for covariates (Unstandardized Beta = -0.05, p = 0.005).
  • Age, delirium, pre-stroke cognitive impairment, and stroke severity were also significant predictors of post-stroke cognition.

Conclusions:

  • Pre-stroke frailty is a significant independent predictor of acute cognitive impairment following stroke.
  • Frailty may act as a moderator influencing cognitive outcomes after a stroke.
  • These findings underscore the importance of assessing frailty in stroke patients to identify individuals at higher risk for cognitive deficits.