Effect of 24-month physical activity on cognitive frailty and the role of inflammation: the LIFE randomized clinical trial View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-12

AUTHORS

Zuyun Liu, Fang-Chi Hsu, Andrea Trombetti, Abby C. King, Christine K. Liu, Todd M. Manini, Roger A. Fielding, Marco Pahor, Anne B. Newman, Stephen Kritchevsky, Thomas M. Gill, for the LIFE Study investigators

ABSTRACT

BACKGROUND: Whether physical activity can reduce cognitive frailty-a relatively new "compound" phenotype proposed in 2013-and whether the effect of physical activity differs based on levels of inflammation are unknown. Therefore, this study aimed to evaluate the effect of physical activity on cognitive frailty and whether baseline interleukin-6 (IL-6) levels modified this effect. METHODS: We used data from the Lifestyle Interventions and Independence for Elders (LIFE) Study, a multicenter, single-blinded randomized trial conducted at eight US field centers between February 2010 and December 2013. The main outcome was cognitive frailty at 24 months, expressed as an ordinal variable based on the six combinations of its two components: frailty (non-frail, pre-frail, and frail) and mild cognitive impairment (yes, no). Frailty and cognition were assessed by the Study of Osteoporotic Fractures (SOF) index and the Modified Mini-Mental State Examination (3MSE) scale, respectively. Plasma IL-6 was measured at baseline. Of the 1635 original randomized sedentary participants (70-89 years), this study included 1298 participants with data on both cognitive frailty and IL-6 assessments at baseline. RESULTS: After adjusting for field center, sex, and baseline levels of cognitive frailty, the ordinal logistic regression model revealed that participants in the physical activity group had 21% lower odds (odds ratio, 0.79; 95% confidence interval, 0.64-0.98) of worsening cognitive frailty over 24 months than those in the health education group. The effect of physical activity on cognitive frailty did not differ according to baseline IL-6 levels (P for interaction = 0.919). The results did not change after additional adjustment for IL-6 subgroups and the inverse probability of remaining in the study. Comparable results were observed according to age, sex, ethnicity/race, and short physical performance battery score (P for interaction = 0.835, 0.536, 0.934, and 0.458, respectively). CONCLUSIONS: A 24-month structured, moderate-intensity physical activity program reduced cognitive frailty compared with a health education program in sedentary older persons, and this beneficial effect did not differ according to baseline levels of inflammatory biomarker IL-6. These findings suggest that the new cognitive frailty construct is modifiable and highlight the potential of targeting cognitive frailty for promoting healthy aging. TRIAL REGISTRATION: Clinicaltrials.gov, NCT01072500. More... »

PAGES

185

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s12916-018-1174-8

DOI

http://dx.doi.org/10.1186/s12916-018-1174-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1107417732

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30352583


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