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Hicks CW, Wang D, Windham BG, Matsushita K, Selvin E. Prevalence of peripheral neuropathy defined by monofilament insensitivity in middle-aged and older adults in two US cohorts. Sci Rep 2021; 11:19159. [PMID: 34580377 PMCID: PMC8476511 DOI: 10.1038/s41598-021-98565-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 08/25/2021] [Indexed: 02/06/2023] Open
Abstract
Peripheral neuropathy is associated with substantial morbidity, but risk factors other than diabetes are largely uncharacterized. The aim of this study was to describe the prevalence and risk factors for peripheral neuropathy in adults with and without diabetes from two different population-based studies in the US. We performed a cross-sectional analysis of 5200 black and white participants from NHANES (1999-2004, age 40-85 years) and 3362 black and white participants from the ARIC Study (2016-2017, age 70-89 years) who underwent monofilament testing for peripheral neuropathy using a shared protocol. We used logistic regression to quantify age, sex, and race-adjusted risk factor associations for peripheral neuropathy among middle-aged (40-69 years) and older (≥ 70 years) adults. The age, sex, and race-adjusted prevalence of peripheral neuropathy (decreased sensation on monofilament testing) was 10.4% for middle-aged adults in NHANES, 26.8% for older adults in NHANES, and 39.2% for older adults in ARIC. Diabetes was an important risk factor, but more strongly associated with peripheral neuropathy in middle-aged (OR ~ 5 for long-standing diabetes) compared to older adults (ORs ~ 1.5-2). Male sex (ORs ~ 2), black race (ORs ~ 1.3-1.5), and greater height (ORs ~ 1.5-3) were robust risk factors for peripheral neuropathy. Other risk factors included body mass index, education, and peripheral artery disease. The burden of peripheral neuropathy defined by abnormal monofilament testing among older adults is substantial, even among adults without diabetes. Studies are needed to understand the etiology and prognosis of peripheral neuropathy in the absence of diabetes.
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Affiliation(s)
- Caitlin W Hicks
- Division of Vascular Surgery and Endovascular Therapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dan Wang
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 2024 E. Monument St., Suite 2-600, Baltimore, MD, 21287, USA
| | - B Gwen Windham
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
| | - Kunihiro Matsushita
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 2024 E. Monument St., Suite 2-600, Baltimore, MD, 21287, USA
| | - Elizabeth Selvin
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 2024 E. Monument St., Suite 2-600, Baltimore, MD, 21287, USA.
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Orange ST, Marshall P, Madden LA, Vince RV. Can sit-to-stand muscle power explain the ability to perform functional tasks in adults with severe obesity? J Sports Sci 2018; 37:1227-1234. [DOI: 10.1080/02640414.2018.1553500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Samuel T. Orange
- Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, UK
- Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Newcastle Upon Tyne, UK
| | - Phil Marshall
- Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, UK
| | - Leigh A. Madden
- Centre of Biomedical Research, School of Life Sciences, University of Hull, Hull, UK
| | - Rebecca V. Vince
- Sport, Health and Exercise Science, School of Life Sciences, University of Hull, Hull, UK
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Chalhoub D, Boudreau R, Greenspan S, Newman AB, Zmuda J, Frank-Wilson AW, Nagaraj N, Hoffman AR, Lane NE, Stefanick ML, Barrett-Connor E, Dam T, Cawthon PM, Orwoll ES, Cauley JA. Associations Between Lean Mass, Muscle Strength and Power, and Skeletal Size, Density and Strength in Older Men. J Bone Miner Res 2018; 33:1612-1621. [PMID: 29701926 PMCID: PMC6266871 DOI: 10.1002/jbmr.3458] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 04/17/2018] [Accepted: 04/22/2018] [Indexed: 11/06/2022]
Abstract
Studies examining the relationship between muscle parameters and bone strength have not included multiple muscle measurements and/or both central and peripheral skeletal parameters. The purpose of this study was to explore the relationship between lean mass, muscle strength and power, and skeletal size, bone density, and bone strength. We studied the association between appendicular lean mass (ALM), grip strength, and leg power, and central quantitative computed tomography (QCT) parameters in 2857 men aged 65 years or older; peripheral QCT was available on a subset (n = 786). ALM, grip strength, and leg power were measured by dual-energy X-ray absorptiometry (DXA), Jamar dynamometer, and the Nottingham Power Rig, respectively. Multivariable models adjusting for potential confounders including age, race, study site, BMI, and muscle measurements were developed and least squares means were generated from linear regression models. For the multivariable model, percent differences of bone parameters between lowest (Q1) and highest quartiles (Q4) of ALM, grip strength, and leg power were reported. ALM was significantly associated with central and peripheral QCT parameters: percent higher values (Q4 versus Q1) ranging from 3.3% (cortical volumetric bone mineral density [vBMD] of the femoral neck) to 31% (vertebral strength index of the spine). Grip strength was only significantly associated with radial parameters: percent higher values (Q4 versus Q1) ranging from 2.5% (periosteal circumference) to 7.5% (33% axial strength index [SSIx]). Leg power was associated with vertebral strength and lower cross-sectional area with percent lower values (Q4 versus Q1) of -11.9% and -2.7%, respectively. In older men, stronger associations were observed for ALM compared to muscle strength and power. Longitudinal studies are needed to examine the relationship between independent changes in muscle measurements and skeletal size, density and strength. © 2018 American Society for Bone and Mineral Research.
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Affiliation(s)
- Didier Chalhoub
- Intramural Research Program, Laboratory of Epidemiology, and Population Sciences, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Robert Boudreau
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Susan Greenspan
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joseph Zmuda
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Andrew W Frank-Wilson
- Intramural Research Program, Laboratory of Epidemiology, and Population Sciences, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Nayana Nagaraj
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Andrew R Hoffman
- Department of Endocrinology, Stanford University School of Medicine, CA, USA
| | - Nancy E Lane
- Center for Musculoskeletal Health, University of California, Davis School of Medicine, Davis, CA, USA
| | - Marcia L Stefanick
- Department of Endocrinology, Stanford University School of Medicine, CA, USA
| | - Elizabeth Barrett-Connor
- Division of Epidemiology, Department of Family and Preventive Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Tien Dam
- Division of Epidemiology, Department of Family and Preventive Medicine, University of California, San Diego, La Jolla, CA, USA.,Division of Geriatrics and Aging, Columbia University, New York, NY, USA
| | - Peggy M Cawthon
- Research Institute, San Francisco Coordinating Center, California Pacific Medical Center, San Francisco, CA, USA
| | - Eric S Orwoll
- School of Medicine, Oregon Health and Science University, Portland, OR, USA
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
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Glenn JM, Gray M, Binns A. Relationship of Sit-to-Stand Lower-Body Power With Functional Fitness Measures Among Older Adults With and Without Sarcopenia. J Geriatr Phys Ther 2018; 40:42-50. [PMID: 26428899 DOI: 10.1519/jpt.0000000000000072] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND PURPOSE When evaluating health in older adults, batteries of tests are typically utilized to assess functional fitness. Unfortunately, physician's visits are time-sensitive, and it may be important to develop faster methods to assess functional fitness that can be utilized in professional or clinical settings. Therefore, the purpose of this investigation was to examine the relationship of sit-to-stand (STS) power generated through the STS task with previously established measures of functional fitness, specifically strength, endurance, speed, agility, and flexibility in older adults with and without sarcopenia. METHODS This study consisted of 57 community-dwelling older adults (n = 16 males; n = 41 females). Functional fitness was assessed using the Short Physical Performance Battery (SPPB), Senior Fitness Test, handgrip, gait speed (habitual and maximal), balance, and STS power generated via the Tendo Weightlifting Analyzer. On the basis of data distribution, second-degree polynomial (quadratic) curvilinear models (lines of best fit) were applied for the relationships of 5-time STS time with average and peak power. Zero-order correlations were evaluated between STS power and all other functional fitness measures. Older adults with sarcopenia were also identified (n = 15), and relationships were reevaluated within this subset. RESULTS STS power (average and peak) was significantly (P ≤ .01) correlated with physical performance measured via previously established assessments. For average power, this was observed during the senior fitness test (6-minute walk [r = 0.39], 8-ft up-and-go [r = -0.46], arm curl [r = 0.46], and chair stand [r = 0.55]), SPPB (5-time STS time [r = -0.63] and 8-ft walk [r = -0.32]), and other independent functional fitness measures (grip strength [r = 0.65] and maximal gait speed [r = -0.31]). Similar results were observed for peak power during the senior fitness test (6-minute walk [r = 0.39], 8-ft up-and-go [r = -0.46], arm curl [r = 0.45], chair stand [r = 0.52], and sit-and-reach [r = -0.27]), SPPB (5-time STS time [r = -0.60] and 8-ft walk [r = -0.33]), and other independent functional fitness measures (grip strength [r = 0.70] and maximal gait speed [r = -0.32]). Within the sarcopenic subset, for average and peak power, respectively, significant relationships were still retained for handgrip strength (r = 0.57 and r = 0.57), 6-minute walk (r = 0.55 and r = 0.61), chair stand (r = 0.76 and r = 0.81), and 5-time STS time (r = -0.76 and r = -0.80) tests. DISCUSSION/CONCLUSIONS STS power generated via the STS task significantly relates to commonly administered functional fitness measures. These relationships also appear to exist when evaluating these relationships in older adults with sarcopenia. STS power may be utilized as an independent measure of functional fitness that is feasible to incorporate in clinical settings where time and space are often limiting factors.
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Affiliation(s)
- Jordan M Glenn
- 1Human Performance Laboratory, Office for Studies on Aging, University of Arkansas, Fayetteville, Arkansas. 2Sport and Movement Science Laboratory, Louisiana Tech University, Ruston, Louisiana
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Predicting the Future Need of Walking Device or Assistance by Moderate to Vigorous Physical Activity: A 2-Year Prospective Study of Women Aged 75 Years and Above. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1340479. [PMID: 30027095 PMCID: PMC6031078 DOI: 10.1155/2018/1340479] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 05/12/2018] [Indexed: 11/18/2022]
Abstract
Objective To examine the association between daily moderate to vigorous physical activity (MVPA) and the change in mobility function among community-dwelling Japanese women aged 75 years and above. Methods This prospective study included 330 older women aged 75 years and above who could walk without a walking device or assistance. MVPA and light-intensity physical activity (LPA) were assessed using an accelerometer for seven consecutive days. MVPA was defined as an activity with an intensity of >3 metabolic equivalents. The study outcome was a change in mobility function, defined as the need of walking device or assistance, during the two-year period. Results The results of the logistic regression analysis showed that MVPA was inversely associated with a decline in mobility function after controlling for LPA and potential confounders (adjusted odds ratio (OR) = 0.93 per 1 min/d, 95% confidence interval (CI) = 0.88-0.99; P = 0.017), whereas LPA was not when adjusted for MVPA and confounders (adjusted OR = 0.99 per 1 min/d, 95% CI = 0.96-1.01; P = 0.245). The receiver operating characteristics analysis identified a 7.9 min/d of MVPA as the cut-off value. Conclusions The results of this study suggest the importance of promoting daily MVPA for preventing mobility limitation in older women aged 75 years and above.
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Duration of moderate to vigorous daily activity is negatively associated with slow walking speed independently from step counts in elderly women aged 75 years or over: A cross-sectional study. Arch Gerontol Geriatr 2018; 74:94-99. [DOI: 10.1016/j.archger.2017.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 10/02/2017] [Accepted: 10/03/2017] [Indexed: 12/25/2022]
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Lange-Maia BS, Newman AB, Jakicic JM, Cauley JA, Boudreau RM, Schwartz AV, Simonsick EM, Satterfield S, Vinik AI, Zivkovic S, Harris TB, Strotmeyer ES. Relationship between sensorimotor peripheral nerve function and indicators of cardiovascular autonomic function in older adults from the Health, Aging and Body Composition Study. Exp Gerontol 2017; 96:38-45. [PMID: 28442382 DOI: 10.1016/j.exger.2017.04.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 04/06/2017] [Accepted: 04/18/2017] [Indexed: 01/17/2023]
Abstract
BACKGROUND Age-related peripheral nervous system (PNS) impairments are highly prevalent in older adults. Although sensorimotor and cardiovascular autonomic function have been shown to be related in persons with diabetes, the nature of the relationship in general community-dwelling older adult populations is unknown. METHODS Health, Aging and Body Composition participants (n=2399, age=76.5±2.9years, 52% women, 38% black) underwent peripheral nerve testing at the 2000/01 clinic visit. Nerve conduction amplitude and velocity were measured at the peroneal motor nerve. Sensory nerve function was assessed with vibration detection threshold and monofilament (1.4-g/10-g) testing at the big toe. Symptoms of lower-extremity peripheral neuropathy were collected by self-report. Cardiovascular autonomic function indicators included postural hypotension, resting heart rate (HR), as well as HR response to and recovery from submaximal exercise testing (400m walk). Multivariable modeling adjusted for demographic/lifestyle factors, medication use and comorbid conditions. RESULTS In fully adjusted models, poor motor nerve conduction velocity (<40m/s) was associated with greater odds of postural hypotension, (OR=1.6, 95% CI: 1.0-2.5), while poor motor amplitude (<1mV) was associated with 2.3beats/min (p=0.003) higher resting HR. No associations were observed between sensory nerve function or symptoms of peripheral neuropathy and indicators of cardiovascular autonomic function. CONCLUSIONS Motor nerve function and indicators of cardiovascular autonomic function remained significantly related even after considering many potentially shared risk factors. Future studies should investigate common underlying processes for developing multiple PNS impairments in older adults.
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Affiliation(s)
- Brittney S Lange-Maia
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 N. Bellefield Ave., 5th Floor, Pittsburgh, PA 15213, United States
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 N. Desoto Street., A528 Crabtree Hall, Pittsburgh, PA 15261, United States
| | - John M Jakicic
- Department of Health and Physical Activity, School of Education, University of Pittsburgh, Oak Hill Commons, 32 Oak Hill Court, Pittsburgh, PA 15261, United States
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 N. Desoto Street, A510 Crabtree Hall, Pittsburgh, PA 15261, United States
| | - Robert M Boudreau
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 N. Bellefield Ave., 5th Floor, Pittsburgh, PA 15213, United States
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics, University of California San Francisco, 550 16th Street, San Francisco, CA 94158, United States
| | - Eleanor M Simonsick
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224, United States
| | - Suzanne Satterfield
- Department of Preventive Medicine, University of Tennessee Health Science Center, 649 Doctor's Office Building, 66 N. Pauline St., Memphis, TN 38163, United States
| | - Aaron I Vinik
- Department of Neurobiology, Eastern Virginia Medical School, 855 W. Brambleton Avenue, Norfolk, VA 23510, United States
| | - Sasa Zivkovic
- Department of Neurology, University of Pittsburgh, 3471 Fifth Ave. Suite 810, Pittsburgh, PA 15213, United States
| | - Tamara B Harris
- Intramural Research Program, Laboratory of Epidemiology, and Population Sciences, National Institute on Aging, National Institutes of Health, Laboratory of Epidemiology, Demography, and Biometry, Gateway Building, 3C309, 7201 Wisconsin Avenue, Bethesda, MD 20892, United States
| | - Elsa S Strotmeyer
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 N. Bellefield Ave., 5th Floor, Pittsburgh, PA 15213, United States.
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Hamilton R, Walsh M, Singh R, Rodriguez K, Gao X, Rahman MM, Chaudhuri A, Bhattacharya A. Oxidative damage to myelin proteins accompanies peripheral nerve motor dysfunction in aging C57BL/6 male mice. J Neurol Sci 2016; 370:47-52. [PMID: 27772785 DOI: 10.1016/j.jns.2016.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/01/2016] [Accepted: 09/12/2016] [Indexed: 01/31/2023]
Abstract
Aging is associated with a decline in peripheral nerve function of both motor and sensory nerves. The decline in function of peripheral sensorimotor nerves with aging has been linked to sarcopenia, the age-related decline in muscle mass and function that significantly compromises the quality of life in older humans. In this study, we report a significant increase in oxidized fatty acids and insoluble protein carbonyls in sciatic nerves of aged C57BL/6 male mice (28-30mo) that exhibit a profound decline in motor nerve function and degenerative changes in both axon and myelin structure, compared to young mice (6-8mo). Our data further suggests that this age-related loss of function of peripheral motor nerves is likely precipitated by changes in mechanisms that protect and/or repair oxidative damage. We predict that interventions that target these mechanisms may protect against age-related decline in peripheral sensorimotor nerve function and likely improve the debilitating outcome of sarcopenia in older humans.
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Affiliation(s)
- Ryan Hamilton
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, USA
| | - Michael Walsh
- Department of Cell Systems and Anatomy, The University of Texas Health Science Center, San Antonio, TX, USA; Barshop Institute for Longevity and Aging Studies, San Antonio, TX, USA
| | - Rashmi Singh
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, USA
| | - Karl Rodriguez
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, USA
| | - Xiaoli Gao
- Department of Biochemistry, The University of Texas Health Science Center, San Antonio, TX, USA
| | - Md Mizanur Rahman
- Department of Medicine, The University of Texas Health Science Center, San Antonio, TX, USA
| | - Asish Chaudhuri
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Arunabh Bhattacharya
- Department of Cell Systems and Anatomy, The University of Texas Health Science Center, San Antonio, TX, USA; Barshop Institute for Longevity and Aging Studies, San Antonio, TX, USA.
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Abstract
We determined whether sensorimotor peripheral nerve (PN) function was associated with physical activity (PA) in older men. The Osteoporotic Fractures in Men Study Pittsburgh, PA, site (n = 328, age 78.8 ± 4.7 years) conducted PN testing, including: peroneal motor and sural sensory nerve conduction (latencies, amplitudes: CMAP and SNAP for motor and sensory amplitude, respectively), 1.4g/10g monofilament (dorsum of the great toe), and neuropathy symptoms. ANOVA and multivariate linear regression modeled PN associations with PA (Physical Activity Scale for the Elderly [PASE] and SenseWear Armband). After multivariable adjustment, better motor latency was associated with higher PASE scores (160.5 ± 4.8 vs. 135.6 ± 6.7, p < .01). Those without versus with neuropathy symptoms had higher PASE scores (157.6 ± 5.3 vs. 132.9 ± 7.1, p < .01). Better versus worse SNAP was associated with slightly more daily vigorous activity (9.5 ± 0.8 vs. 7.3 ± 0.7, p = .05). Other PN measures were not associated with PA. Certain PN measures were associated with lower PA, suggesting a potential pathway for disability.
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Ward RE, Caserotti P, Cauley JA, Boudreau RM, Goodpaster BH, Vinik AI, Newman AB, Strotmeyer ES. Mobility-Related Consequences of Reduced Lower-Extremity Peripheral Nerve Function with Age: A Systematic Review. Aging Dis 2015; 7:466-78. [PMID: 27493833 DOI: 10.14336/ad.2015.1127] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 11/27/2015] [Indexed: 11/01/2022] Open
Abstract
The objective of this study is to systematically review the relationship between lower-extremity peripheral nerve function and mobility in older adults. The National Library of Medicine (PubMed) was searched on March 23, 2015 with no limits on publication dates. One reviewer selected original research studies of older adults (≥65 years) that assessed the relationship between lower-extremity peripheral nerve function and mobility-related outcomes. Participants, study design and methods of assessing peripheral nerve impairment were evaluated and results were reported and synthesized. Eight articles were identified, including 6 cross-sectional and 2 longitudinal studies. These articles investigated 6 elderly cohorts (4 from the U.S. and 2 from Italy): 3 community-dwelling (including 1 with only disabled women and 1 without mobility limitations at baseline), 1 with both community-dwelling and institutionalized residents, 1 from a range of residential locations, and 1 of patients with peripheral arterial disease. Mean ages ranged from 71-82 years. Nerve function was assessed by vibration threshold (n=2); sensory measures and clinical signs and symptoms of neuropathy (n=2); motor nerve conduction (n=1); and a combination of both sensory measures and motor nerve conduction (n=3). Each study found that worse peripheral nerve function was related to poor mobility, although relationships varied based on the nerve function measure and mobility domain assessed. Six studies found that the association between nerve function and mobility persisted despite adjustment for diabetes. Evidence suggests that peripheral nerve function impairment at various levels of severity is related to poor mobility independent of diabetes. Relationships varied depending on peripheral nerve measure, which may be particularly important when investigating specific biological mechanisms. Future research needs to identify risk factors for peripheral nerve decline beyond diabetes, especially those common in late-life and modifiable. Interventions to preserve nerve function should be investigated with regard to their effect on postponing or preventing disability in older adults.
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Affiliation(s)
- Rachel E Ward
- 1Spaulding Rehabilitation Hospital, Cambridge, MA 02138, USA; 2School of Public Health, Boston University, Boston, MA 00218, USA
| | - Paolo Caserotti
- 3Department of Sports Science and Clinical Biomechanics, University of Southern, Denmark, Odense, Denmark
| | - Jane A Cauley
- 4Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Robert M Boudreau
- 4Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Aaron I Vinik
- 6Department of Neurobiology, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Anne B Newman
- 4Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Elsa S Strotmeyer
- 4Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
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Ward RE, Boudreau RM, Caserotti P, Harris TB, Zivkovic S, Goodpaster BH, Satterfield S, Kritchevsky S, Schwartz AV, Vinik AI, Cauley JA, Newman AB, Strotmeyer ES. Sensory and motor peripheral nerve function and longitudinal changes in quadriceps strength. J Gerontol A Biol Sci Med Sci 2014; 70:464-70. [PMID: 25320056 DOI: 10.1093/gerona/glu183] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Poor peripheral nerve function is common in older adults and may be a risk factor for strength decline, although this has not been assessed longitudinally. METHODS We assessed whether sensorimotor peripheral nerve function predicts strength longitudinally in 1,830 participants (age = 76.3 ± 2.8, body mass index = 27.2 ± 4.6kg/m(2), strength = 96.3 ± 34.7 Nm, 51.0% female, 34.8% black) from the Health ABC study. Isokinetic quadriceps strength was measured semiannually over 6 years. Peroneal motor nerve conduction amplitude and velocity were recorded. Sensory nerve function was assessed with 10-g and 1.4-g monofilaments and average vibration detection threshold at the toe. Lower-extremity neuropathy symptoms were self-reported. RESULTS Worse vibration detection threshold predicted 2.4% lower strength in men and worse motor amplitude and two symptoms predicted 2.5% and 8.1% lower strength, respectively, in women. Initial 10-g monofilament insensitivity predicted 14.2% lower strength and faster strength decline in women and 6.6% lower strength in men (all p < .05). CONCLUSION Poor nerve function predicted lower strength and faster strength decline. Future work should examine interventions aimed at preventing declines in strength in older adults with impaired nerve function.
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Affiliation(s)
- Rachel E Ward
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
| | - Robert M Boudreau
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
| | - Paolo Caserotti
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Tamara B Harris
- Laboratory of Epidemiology, Biometry, and Demography, National Institute on Aging, NIH, Bethesda, Maryland
| | | | - Bret H Goodpaster
- Department of Medicine, School of Medicine, University of Pittsburgh, Pennsylvania
| | - Suzanne Satterfield
- Department of Preventive Medicine, University of Tennessee, Health Science Center, Memphis
| | - Stephen Kritchevsky
- Department of Internal Medicine-Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Aaron I Vinik
- Department of Neurobiology, Eastern Virginia Medical School, Norfolk
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
| | - Elsa S Strotmeyer
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania.
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