Integrating Frailty and Cognitive Phenotypes: Why, How, Now What?

Area of Science:

• Gerontology
• Neuroscience
• Biomedical Science

Background:

• Frailty and cognitive impairment frequently coexist in older adults.
• This association has prompted discussions on expanding the definition of frailty to encompass cognitive aspects.
• Significant variability exists in current approaches to integrated physical and cognitive frailty phenotypes.

Purpose of the Study:

• To review the concept of frailty in relation to reserve and resilience.
• To examine the shared pathophysiology between physical frailty and cognitive impairment.
• To explore theoretical underpinnings of integrated physical and cognitive impairment phenotypes.
• To assess the potential of biomarkers in refining and validating these phenotypes.

Main Methods:

• Literature review and synthesis of existing research.
• Analysis of theoretical frameworks for integrated frailty phenotypes.
• Discussion of shared and distinct biological pathways.

Main Results:

• Physical frailty and cognitive impairment are significantly associated in the elderly population.
• Current methods for defining integrated physical and cognitive frailty phenotypes show considerable heterogeneity.
• There is a need for clearer definitions and theoretical grounding in developing these integrated phenotypes.

Conclusions:

• Future development of integrated frailty and cognitive phenotypes must clearly define the specific impairments captured.
• Prioritizing biological theories is crucial for understanding shared and distinct pathways in the progression of physical and cognitive impairments.
• Biomarker incorporation is essential for phenotype refinement and validation.