Prevalence of diabetic peripheral neuropathy and relation to glycemic control therapies at baseline in the BARI 2D cohort

J Peripher Nerv Syst. 2009 Mar;14(1):1-13. doi: 10.1111/j.1529-8027.2009.00200.x.

Abstract

We evaluated the associations between glycemic therapies and prevalence of diabetic peripheral neuropathy (DPN) at baseline among participants in the Bypass Angioplasty Revascularization Investigation 2 Diabetes (BARI 2D) trial on medical and revascularization therapies for coronary artery disease (CAD) and on insulin-sensitizing vs. insulin-providing treatments for diabetes. A total of 2,368 patients with type 2 diabetes and CAD was evaluated. DPN was defined as clinical examination score >2 using the Michigan Neuropathy Screening Instrument (MNSI). DPN odds ratios across different groups of glycemic therapy were evaluated by multiple logistic regression adjusted for multiple covariates including age, sex, hemoglobin A1c (HbA1c), and diabetes duration. Fifty-one percent of BARI 2D subjects with valid baseline characteristics and MNSI scores had DPN. After adjusting for all variables, use of insulin was significantly associated with DPN (OR = 1.57, 95% CI: 1.15-2.13). Patients on sulfonylurea (SU) or combination of SU/metformin (Met)/thiazolidinediones (TZD) had marginally higher rates of DPN than the Met/TZD group. This cross-sectional study in a cohort of patients with type 2 diabetes and CAD showed association of insulin use with higher DPN prevalence, independent of disease duration, glycemic control, and other characteristics. The causality between a glycemic control strategy and DPN cannot be evaluated in this cross-sectional study, but continued assessment of DPN and randomized therapies in BARI 2D trial may provide further explanations on the development of DPN.

Trial registration: ClinicalTrials.gov NCT00006305.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • Aged
  • Cohort Studies
  • Coronary Artery Bypass / methods
  • Coronary Artery Disease / complications
  • Coronary Artery Disease / therapy
  • Cross-Sectional Studies
  • Diabetes Mellitus, Type 2 / complications
  • Diabetes Mellitus, Type 2 / drug therapy
  • Diabetic Neuropathies / drug therapy*
  • Diabetic Neuropathies / epidemiology*
  • Diabetic Neuropathies / etiology
  • Female
  • Glycated Hemoglobin A / metabolism
  • Humans
  • Hypoglycemic Agents / therapeutic use*
  • Insulin / therapeutic use
  • Logistic Models
  • Male
  • Metformin / therapeutic use
  • Middle Aged
  • Neurologic Examination
  • Prevalence
  • Randomized Controlled Trials as Topic
  • Sulfonylurea Compounds / therapeutic use
  • Thiazolidinediones / therapeutic use

Substances

  • Glycated Hemoglobin A
  • Hypoglycemic Agents
  • Insulin
  • Sulfonylurea Compounds
  • Thiazolidinediones
  • Metformin

Associated data

  • ClinicalTrials.gov/NCT00006305