#for_researcher

Physical Frailty Assessment in Older Women: Can Simplification Be Achieved Without Loss of Syndrome Measurement Validity?

Q.L. Xue, J. Tian, L.P. Fried, et al.

Am J Epidemiol. 2016;183(11):1037-44

Different phenotypes have increasingly been used as tools for clinical characterization of frailty among older adults. Although there have been studies about the comparability and effectiveness of various simplifications and approximations of existing frailty phenotypes for risk prediction, there have been no studies in which investigators evaluated the stability of the clinical characterization achieved. Findings obtained shown that it was no merely the number of criteria used to characterize the PFPs but rather the specific criteria combinations that predicted the risk of adverse outcomes. There are clinically important contexts in which simplified PFPs cannot be used interchangeably.

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Motor Performance and Physical Activity as Predictors of Prospective Falls in Community-Dwelling Older Adults by Frailty Level: Application of Wearable Technology

M.J. Mohler, C.S. Wendel , R.E. Taylor-Piliae, et al.

Gerontology. 2016;62(6):654-664

This study aimed to evaluate wearable sensor-based measures of gait, balance, and physical activity that are predictive of future falls in community-dwelling older adults. Results obtained suggests that independent predictors of falls are dependent on frailty status. Among sensor-derived parameters, balance deficit, longer typical walking episodes, and shorter typical standing episodes were the most sensitive predictors of prospective falls in the combined pre-frail and frail sample. Gait deficit was not a sensitive fall predictor in the context of frailty status.

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Association of frailty with the serine protease HtrA1 in older adults

M. Lorenzi, T. Lorenzi, E. Marzetti, et al.

Exp Gerontol. 2016;81:8-12

High-temperature requirement serine protease A1 (HtrA1) is a secreted multidomain serine protease implicated in the inhibition of signaling of active transforming growth factor-β (TGF-β)1, a cytokine which has an important anti-inflammation role.

These findings demonstrate for the first time the association of plasma levels of HtrA1 with frailty status.

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Associations of Computed Tomography-Based Trunk Muscle Size and Density With Balance and Falls in Older Adults

D.E. Anderson, E. Quinn, E. Parker, et al.

J Gerontol A Biol Sci Med Sci. 2016;71(6):811-6

Aging is associated with significant declines in muscle size and density, but associations of trunk muscle size and density with balance and falls in older adults have not been previously examined. Results suggest that higher muscle density was associated with reduced postural sway, particularly sway velocities, in both men and women, and better Short Physical Performance Battery score in women, but was not associated with falls.

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Consumption of fruit and vegetables and risk of frailty: a dose-response analysis of 3 prospective cohorts of community-dwelling older adults

E. García-Esquinas, B. Rahi, K. Peres, et al.

Am J Clin Nutr. 2016;104(1):132-42

We sought to examine the dose-response association between fruit and vegetables consumption and the risk of frailty in older adults.

Among community-dwelling older adults, fruit and vegetables consumption was associated with a lower short-term risk of frailty in a dose-response manner, and the strongest association was obtained with 3 portions of fruit/d and 2 portions of vegetables/d

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Phenotype of sarcopenic obesity in older individuals with a history of falling

Y.R. Huo, P. Suriyaarachchi, F. Gomez, et al.

Arch Gerontol Geriatr. 2016;65:255-9

The goal of this study was to obtain a comprehensive phenotype of sarcopenic obesity in this high-risk population. Authors have found that sarcopenic obese subjects were older (81.1±7.3), mostly female and more likely to have lower bone mineral density, lower grip strength, slower gait velocity, and poor balance. Sarcopenic obese individuals also showed significantly higher parathyroid hormone and lower vitamin D.

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Myostatin antibody (LY2495655) in older weak fallers: a proof-of-concept, randomised, phase 2 trial

C. Becker, S.R. Lord, S.A. Studenski, et al.

Lancet Diabetes Endocrinol. 2015;3:948-957

Myostatin inhibits skeletal muscle growth. The humanised monoclonal antibody LY2495655 (LY) binds and neutralises myostatin. This study aimed to test whether LY increases appendicular lean body mass (aLBM) and improves physical performance in older individuals who have had recent falls and low muscle strength and power. At 24 weeks, the least-squares mean change in aLBM was -0.123 kg in the placebo group and 0.303 kg in the LY group (P < 0.0001). This results show LY treatment increases lean mass and might improve functional measures of muscle power.

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Comparison of Handgrip and Leg Extension Strength in Predicting Slow Gait Speed in Older Adults

M.S. Fragala, D.E. Alley, M.D. Shardell, et al.

J Am Geriatr Soc. 2016;64(1):144-50

This study aimed at comparing the relative predictive power of handgrip and leg extension strength in predicting slow walking.

Results suggest that handgrip strength may be an adequate measure to predict physical function whereas leg extension strength is only a slightly better predictor of slow gait speed.

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Macronutrients Intake and Incident Frailty in Older Adults: A Prospective Cohort Study

H. Sandoval-Insausti, R.F. Pérez-Tasigchana, E. López-García, et al.

J Gerontol A Biol Sci Med Sci 2016;71(10):1329-34

This study examined the association of protein and other macronutrient intake with the risk of frailty in older adults. Authors concluded that the intake of total protein, animal protein, and MUFAs was inversely associated with incident frailty. Promoting the intake of these nutrients might reduce frailty.

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Frailty is associated with the epigenetic clock but not with telomere length in a German cohort

L.P. Breitling, K.U. Saum, L. Perna, et al.

Clinical Epigenetics. 2016;8:21

The epigenetic clock, in particular epigenetic pre-aging quantified by the so-called DNA methylation age acceleration, has recently suggested to closely correlate with a variety of disease phenotypes. There remains a dearth of data, however, on its association with telomere length and frailty, which can be considered major correlates of age on the genomic and clinical level, respectively. The results of the present study suggest that epigenetic age acceleration is correlated with clinically relevant aging-related phenotypes through pathways unrelated to cellular senescence as assessed by telomere length.

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