Assess overall frailty based on the accumulation of deficits.
Deficit Checklist
Mark all that apply
Frailty Assessment
Frailty Index0.00
StatusRobust
Low risk. The individual is robust and has high physiological reserve.
Biological Aging Summary
Index Interpretation
< 0.10Robust
0.10 - 0.24Pre-Frail
0.25 - 0.44Frail
≥ 0.45Severely Frail
About this calculator
Overview
The Frailty Index (FI) is a measure of a person's biological age and vulnerability to poor health outcomes. It is calculated by identifying the number of 'deficits' (health problems, functional limitations, or comorbidities) an individual has relative to the total number of deficits considered.
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Pro Tips
Use this tool as part of a Comprehensive Geriatric Assessment (CGA).
The index can change over time; track it periodically to monitor responses to interventions like exercise or nutrition.
Focus on 'modifiable deficits' (like nutrition or depression) to reduce the overall frailty score.
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Fun Facts
"A Frailty Index score of 0.25 or higher is typically used to classify an individual as frail."
"The index is more predictive of mortality and hospitalization than chronological age alone."
"It is based on the 'Accumulation of Deficits' model developed by Rockwood and Mitnitski."
"Individuals with an FI > 0.67 are generally at very high risk and may be nearing the biological limit of survival."
Formula: Frailty Index = Number of Present Deficits / Total Potential Deficits (20 Items).
