Ankle-brachial index and inter-artery blood pressure differences as predictors of cognitive function in overweight and obese older adults with diabetes: results from the Action for Health in Diabetes movement and memory study

Int J Geriatr Psychiatry. 2015 Oct;30(10):999-1007. doi: 10.1002/gps.4253. Epub 2014 Dec 26.

Abstract

Objective: Ankle-brachial index (ABI) and interartery systolic blood pressure differences, as markers of vascular disease, are plausible risk factors for deficits in cognitive function among overweight and obese adults with type 2 diabetes.

Methods: The ABI and maximum interartery differences (MIAD) in systolic blood pressures were assessed annually for five years among 479 participants assigned to the control condition in a randomized clinical trial of a behavioral weight loss intervention. A battery of standardized cognitive function tests was administered 4 to 5 years later. Analyses of covariance were used to assess relationships that ABI, MIAD, and progression of ABI and MIAD had with cognitive function.

Results: There was a curvilinear relationship between ABI and a composite index of cognitive function (p = 0.03), with lower ABI being associated with poorer function. In graded fashions, both greater MIAD and increases in MIAD over time also had modest relationships with poorer verbal memory (both p ≤ 0.05), processing speed (both p ≤ 0.05), and composite cognitive function (both p < 0.04). These relationships were independent of each other and remained evident after extensive covariate adjustment.

Conclusions: In overweight and obese adults with type 2 diabetes, lower ABI and larger interartery systolic blood pressure differences have modest, independent, graded relationships with poorer cognitive function 4-5 years later.

Trial registration: ClinicalTrials.gov NCT00017953.

Keywords: arterial disease; cognitive function; diabetes; obesity.

Publication types

  • Clinical Trial
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Aged
  • Analysis of Variance
  • Ankle Brachial Index*
  • Blood Pressure / physiology*
  • Cognition / physiology*
  • Diabetes Mellitus, Type 2 / physiopathology*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Obesity / physiopathology
  • Overweight / complications
  • Overweight / physiopathology*
  • Risk Factors

Associated data

  • ClinicalTrials.gov/NCT00017953

Grant support