title: Metabolic Syndrome Components Are Associated With Symptomatic Polyneuropathy Independent of Glycemic Status.
abstract: Previous studies demonstrate that the metabolic syndrome is associated with distal symmetric polyneuropathy (DSP). We aimed to determine the magnitude of this effect and the precise components involved.
  
  
  
  We determined the symptomatic DSP prevalence in the Health, Aging, and Body Composition (Health ABC) study (prospective cohort study, with subjects aged 70-79 years at baseline), stratified by glycemic status (glucose tolerance test) and the number of additional metabolic syndrome components (updated National Cholesterol Education Program/Adult Treatment Panel III definition). DSP was defined as neuropathic symptoms (questionnaire) plus at least one of three confirmatory tests (heavy monofilament, peroneal conduction velocity, and vibration threshold). Multivariable logistic and linear regression evaluated the association of metabolic syndrome components with DSP in cross-sectional and longitudinal analyses.
  
  
  
  Of 2,382 participants with neuropathy measures (mean age 73.5 ± 2.9 years, 38.2% black, 51.7% women), 21.0% had diabetes, 29.9% prediabetes, 52.8% metabolic syndrome, and 11.1% DSP. Stratified by glycemic status, DSP prevalence increased as the number of metabolic syndrome components increased (P = 0.03). Diabetes (cross-sectional model, odds ratio [OR] 1.65 [95% CI 1.18-2.31]) and baseline hemoglobin A1C (longitudinal model, OR 1.42 [95% CI 1.15-1.75]) were the only metabolic syndrome measures significantly associated with DSP. Waist circumference and HDL were significantly associated with multiple secondary neuropathy outcomes.
  
  
  
  Independent of glycemic status, symptomatic DSP is more common in those with additional metabolic syndrome components. However, the issue of which metabolic syndrome components drive this association, in addition to hyperglycemia, remains unclear. Larger waist circumference and low HDL may be associated with DSP, but larger studies with more precise metabolic measures are needed.
authors.affiliation: Department of Neurology, University of Michigan, Ann Arbor, MI bcallagh@med.umich.edu.
authors.forename: Brian C
authors.initials: BC
authors.lastname: Callaghan
authors.affiliation: School of Public Health, University of Michigan, Ann Arbor, MI.
authors.forename: Rong
authors.initials: R
authors.lastname: Xia
authors.affiliation: School of Public Health, University of Michigan, Ann Arbor, MI.
authors.forename: Mousumi
authors.initials: M
authors.lastname: Banerjee
authors.affiliation: University Bordeaux, ISPED, Centre INSERM U1219-Epidemiologie-Biostatistique, Bordeaux, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: de Rekeneire
authors.affiliation: National Institute on Aging, Bethesda, MD.
authors.forename: Tamara B
authors.initials: TB
authors.lastname: Harris
authors.affiliation: School of Public Health, University of Pittsburgh, Pittsburgh, PA.
authors.forename: Anne B
authors.initials: AB
authors.lastname: Newman
authors.affiliation: School of Public Health, University of Pittsburgh, Pittsburgh, PA.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Satterfield
authors.affiliation: Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA.
authors.forename: Ann V
authors.initials: AV
authors.lastname: Schwartz
authors.affiliation: Strelitz Diabetes Research Institute, Norfolk, VA.
authors.forename: Aaron I
authors.initials: AI
authors.lastname: Vinik
authors.affiliation: Department of Neurology, University of Michigan, Ann Arbor, MI.
authors.forename: Eva L
authors.initials: EL
authors.lastname: Feldman
authors.affiliation: School of Public Health, University of Pittsburgh, Pittsburgh, PA.
authors.forename: Elsa S
authors.initials: ES
authors.lastname: Strotmeyer
mesh_terms: D000368:Aged; D000375:Aging / Q000097:blood; D001786:Blood Glucose / Q000378:metabolism*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006943:Hyperglycemia / Q000097:blood / Q000150:complications / Q000453:epidemiology; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood / Q000150:complications / Q000453:epidemiology*; D011115:Polyneuropathies / Q000097:blood / Q000150:complications / Q000453:epidemiology*; D015995:Prevalence; D055105:Waist Circumference
chemical_list: D001786:Blood Glucose