Ranjani N Moorthi1, Simit Doshi1, Linda F Fried2,3,4, Sharon M Moe1,5, Mark J Sarnak6, Suzanne Satterfield7, Ann V Schwartz8, Michael Shlipak9, Brittney S Lange-Maia10, Tamara B Harris11, Anne B Newman12, Elsa S Strotmeyer12. 1. Department of Medicine, Division of Nephrology, Indiana University School of Medicine, Indianapolis, IN, USA. 2. Renal Section, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA. 3. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA. 4. Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA. 5. Roudebush VA Medical Center, Indianapolis, IN, USA. 6. Department of Medicine, Division of Nephrology, Tufts Medical Center, Boston, MA, USA. 7. Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN, USA. 8. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA. 9. Division of Nephrology, Department of Medicine, San Francisco VA Medical Center, San Francisco, CA; Kidney Health Research Collaborative, San Francisco VA Medical Center and University of California, San Francisco, CA, USA. 10. Department of Preventive Medicine and Center for Community Health Equity, Rush University Medical Center, Chicago, IL, USA. 11. Intramural Research Program, Laboratory of Epidemiology, and Population Sciences, National Institute on Aging, National Institutes of Health, Laboratory of Epidemiology, Demography, and Biometry, Bethesda, MD, USA. 12. Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA.
Abstract
BACKGROUND: Chronic kidney disease (CKD) is associated with poor mobility. Peripheral nerve function alterations play a significant role in low mobility. We tested the hypothesis that early CKD is associated with altered sensory, motor and autonomic nerve function. METHODS: Participants in the Health, Aging and Body Composition cohort who had kidney function measures in Year 3 (1999-2000) and nerve function measurements at Year 4 (2000-01) were analyzed (n = 2290). Sensory (vibration threshold, monofilament insensitivity to light and standard touch), motor [compound motor action potentials (CMAPs), nerve conduction velocities (NCVs)] and autonomic (heart rate response and recovery after a 400-m walk test) nerve function as well as participant characteristics were compared across cystatin C- and creatinine-based estimated glomerular filtration rate categorized as ≤60 (CKD) or >60 mL/min/1.73 m2 (non-CKD). The association between CKD and nerve function was examined with logistic regression adjusted for covariates. RESULTS: Participants with CKD (n = 476) were older (77 ± 3 versus 75 ± 3 years; P < 0.05) and had a higher prevalence of diabetes (20.6% versus 13.1%; P < 0.001). CKD was associated with higher odds for vibration detection threshold {odds ratio [OR] 1.7 [95% confidence interval (CI) 1.1-2.7]} and light touch insensitivity [OR 1.4 (95% CI 1.1-1.7)]. CMAPs and NCVs were not significantly different between CKD and non-CKD patients. In adjusted analyses, participants with CKD had higher odds of an abnormal heart rate response [OR 1.6 (95% CI 1.1-2.2)] and poor heart rate recovery [OR 1.5 (95% CI 1.1-2.0)]. CONCLUSIONS: CKD is associated with changes in sensory and autonomic nerve function, even after adjustment for demographics and comorbidities, including diabetes. Longitudinal studies in CKD are needed to determine the contribution of nerve impairments to clinically important outcomes.
BACKGROUND:Chronic kidney disease (CKD) is associated with poor mobility. Peripheral nerve function alterations play a significant role in low mobility. We tested the hypothesis that early CKD is associated with altered sensory, motor and autonomic nerve function. METHODS:Participants in the Health, Aging and Body Composition cohort who had kidney function measures in Year 3 (1999-2000) and nerve function measurements at Year 4 (2000-01) were analyzed (n = 2290). Sensory (vibration threshold, monofilament insensitivity to light and standard touch), motor [compound motor action potentials (CMAPs), nerve conduction velocities (NCVs)] and autonomic (heart rate response and recovery after a 400-m walk test) nerve function as well as participant characteristics were compared across cystatin C- and creatinine-based estimated glomerular filtration rate categorized as ≤60 (CKD) or >60 mL/min/1.73 m2 (non-CKD). The association between CKD and nerve function was examined with logistic regression adjusted for covariates. RESULTS:Participants with CKD (n = 476) were older (77 ± 3 versus 75 ± 3 years; P < 0.05) and had a higher prevalence of diabetes (20.6% versus 13.1%; P < 0.001). CKD was associated with higher odds for vibration detection threshold {odds ratio [OR] 1.7 [95% confidence interval (CI) 1.1-2.7]} and light touch insensitivity [OR 1.4 (95% CI 1.1-1.7)]. CMAPs and NCVs were not significantly different between CKD and non-CKD patients. In adjusted analyses, participants with CKD had higher odds of an abnormal heart rate response [OR 1.6 (95% CI 1.1-2.2)] and poor heart rate recovery [OR 1.5 (95% CI 1.1-2.0)]. CONCLUSIONS: CKD is associated with changes in sensory and autonomic nerve function, even after adjustment for demographics and comorbidities, including diabetes. Longitudinal studies in CKD are needed to determine the contribution of nerve impairments to clinically important outcomes.
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