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. 2022 Jul;30(7):825-833.
doi: 10.1016/j.jagp.2022.01.012. Epub 2022 Feb 3.

Cognitive Frailty is Associated With Elevated Proinflammatory Markers and a Higher Risk of Mortality

Breno S Diniz  1 , Maria Fernanda Lima-Costa  2 , Sérgio Viana Peixoto  3 , Joselia O A Firmo  2 , Karen C L Torres  4 , Olindo Assis Martins-Filho  5 , Andréa Teixeira-Carvalho  5 , James Grady  6 , George A Kuchel  7 , Erico Castro-Costa  2
Affiliations

Cognitive Frailty is Associated With Elevated Proinflammatory Markers and a Higher Risk of Mortality

Breno S Diniz et al. Am J Geriatr Psychiatry. 2022 Jul.

Abstract

Background: Cognitive impairment and physical frailty are common among older adults and associated with a higher likelihood of adverse health outcomes. These two conditions frequently coexist in the same individual as cognitive frailty, yet few studies have examined the impact of such comorbidity on clinical outcomes or underlying biological mechanisms.

Methods: A total of 1,340 older adults (age ≥60 years old) from the Bambui Cohort Study of Ageing, with a total follow-up of 10 years, were included in this study. Frailty was defined by the accumulation of deficit framework and cognitive impairment based on scores on the MMSE less than 22. In addition, serum IL-6 levels were measured by cytometric bead array assay.

Results: Individuals classified with cognitive frailty had significantly higher serum IL-6 levels compared to the robust, cognitively unimpaired group. Those with cognitive frailty (aOR = 1.97 [1.18-3.27] and prefrailty and cognitive impairment (aOR = 1.83 [1.24-2.69]) had the highest mortality risk over 10 years of follow-up. Higher IL-6 levels were also independently associated with a higher mortality rate (aOR = 1.37 [1.23-1.54]).

Conclusion: Our study shows that cognitive Frailty indicates a vulnerability state and of increasing mortality risk. Our findings also suggested that proinflammatory abnormalities can be viewed as a central phenomenon underlying common age-related problems (e.g., cognitive impairment and Frailty) and outcomes (e.g., mortality).

Keywords: Cognitive frailty; IL-6; aging; inflammation; mortality.

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Conflict of interest statement

Conflict of interest: The authors do not have conflicts of interest to report.

Figures

Figure 1 –
Figure 1 –
Cox proportional hazard ratio analysis for mortality risk according to frailty status.
Figure 2 –
Figure 2 –
Cox proportional hazard ratio analysis for mortality risk according to cognitive impairment status.
See this image and copyright information in PMC

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