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Frailty Assessment in an Aging Mouse Model
Published on: September 23, 2025
Testing an integral conceptual model of frailty
Robbert J Gobbens1, Marcel A van Assen, Katrien G Luijkx
1Rotterdam University of Applied Sciences, Rotterdam, The Netherlands. gobrj@hr.nl
Journal of Advanced Nursing
|December 14, 2011
Summary
This study validates an integral model of frailty, showing life-course determinants, disease, and frailty domains significantly predict adverse outcomes in older adults. Frailty partially mediates the impact of disease on these outcomes.
Area of Science:
- Gerontology
- Public Health
- Epidemiology
Background:
- The integral model of frailty posits a pathway from life-course determinants to frailty and subsequent adverse outcomes.
- It assumes life-course determinants and frailty domains (physical, psychological, social) influence adverse outcomes.
- Disease impacts are mediated by frailty, which is modulated by life-course determinants.
Purpose of the Study:
- To empirically test hypotheses derived from an integral conceptual model of frailty.
- To investigate the relationships between life-course determinants, frailty, chronic diseases, and adverse outcomes in older adults.
- To examine the mediating role of frailty in the disease-adverse outcome relationship.
Main Methods:
- A cross-sectional survey of 213 community-dwelling individuals aged 75 and older.
- Assessment of life-course determinants and frailty using the Tilburg Frailty Indicator.
- Measurement of adverse outcomes via the Groningen Activity Restriction Scale, WHOQOL-BREF, and healthcare utilization data, considering seven chronic diseases.
Main Results:
- Life-course determinants, chronic diseases, and frailty collectively explained 26-57% of the variance in continuous adverse outcomes.
- These predictors significantly accounted for dichotomous adverse outcomes.
- Frailty partially mediated the effect of chronic diseases on all measured adverse outcomes.
Conclusions:
- The three frailty domains (physical, psychological, social) uniquely and differentially impact adverse outcomes.
- Life-course determinants and chronic diseases also independently influence adverse outcomes.
- Findings underscore the utility and importance of the integral conceptual model of frailty for understanding and addressing adverse outcomes in older populations.
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