How to define “frailty” for the elderly?

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“Frailty” is a modern medical term to describe the vulnerable situation the oldest adults may reach at some point. This concept has grown in importance in medicine and is now a priority because of a need for a better understanding of the health and functional status of older persons and a need to prevent or at least delay the onset of late-life disability and its adverse consequences. While there is no consensus regarding the definition of frailty, several biological domains are commonly included in the concept, which is widely accepted in the medical field. A crucial point is that this construct identifies a phenotype of older persons at elevated risk for numerous adverse outcomes). Nevertheless, “frailty” also implies a psychosocial vulnerability and should also be a matter of social concern. The dynamic concept of frailty developed by Rockwood recognizes a complex interplay of assets and deficits, “medical” and “social,” that maintain or threaten independence.