We have located links that may give you full text access.
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Physiological redundancy in older adults in relation to the change with age in the slope of a frailty index.
Journal of the American Geriatrics Society 2010 Februrary
OBJECTIVES: To test the proposition, using routinely available clinical data, that deficit accumulation results in loss of redundancy. In keeping with the reliability theory of aging, this would be quantitated by attenuation in the slope of a Frailty Index (FI) with age. The more deficits, the less steep the slope and the less redundancy.
DESIGN: Cross-sectional analysis of a prospective cohort study, with 5-year mortality data.
SETTING: The clinical sample of the second wave of the Canadian Study of Health and Aging.
PARTICIPANTS: Two thousand three hundred five people aged 70 and older at baseline.
MEASUREMENTS: A FI based on data used for a Comprehensive Geriatric Assessment (CGA), the slope of the relationship between age and the FI-CGA, the limit value of the FI-CGA, mortality.
RESULTS: An age-invariant limit to deficit accumulation was demonstrated; the observed 99% limit was 0.66. At the 25th percentile of deficit accumulation (FI-CGA approximately 0.18), the slope of the FI-CGA in relation to age was 0.044 (range 0.038-0.049). When deficits had increased to 75% of the maximum value (FI-CGA approximately 0.52), the slope fell to 0.021 (range 0.016-0.027). By the 85th percentile (FI-CGA approximately 0.6), the slope had become statistically indistinguishable from 0.
CONCLUSION: As predicted by the reliability theory of aging, the rate of deficit accumulation slows with increasing frailty. A FI derived from data routinely collected as part of a CGA can in this way quantify loss of redundancy in older adults. Quantifying loss of redundancy can aid clinical decision-making; its application to individual prognostication in clinical samples warrants further evaluation.
DESIGN: Cross-sectional analysis of a prospective cohort study, with 5-year mortality data.
SETTING: The clinical sample of the second wave of the Canadian Study of Health and Aging.
PARTICIPANTS: Two thousand three hundred five people aged 70 and older at baseline.
MEASUREMENTS: A FI based on data used for a Comprehensive Geriatric Assessment (CGA), the slope of the relationship between age and the FI-CGA, the limit value of the FI-CGA, mortality.
RESULTS: An age-invariant limit to deficit accumulation was demonstrated; the observed 99% limit was 0.66. At the 25th percentile of deficit accumulation (FI-CGA approximately 0.18), the slope of the FI-CGA in relation to age was 0.044 (range 0.038-0.049). When deficits had increased to 75% of the maximum value (FI-CGA approximately 0.52), the slope fell to 0.021 (range 0.016-0.027). By the 85th percentile (FI-CGA approximately 0.6), the slope had become statistically indistinguishable from 0.
CONCLUSION: As predicted by the reliability theory of aging, the rate of deficit accumulation slows with increasing frailty. A FI derived from data routinely collected as part of a CGA can in this way quantify loss of redundancy in older adults. Quantifying loss of redundancy can aid clinical decision-making; its application to individual prognostication in clinical samples warrants further evaluation.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app