Blood pressure levels in pre-diabetic stages are associated with worse cognitive functioning in patients with type 2 diabetes

Esther van den Berg*, Jacqueline M. Dekker, Giel Nijpels, Roy P. C. Kessels, L. Jaap Kappelle, Edward H. F. de Haan, Robert J. Heine, Coen D. A. Stehouwer, Geert Jan Biessels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

Background Type 2 diabetes mellitus (T2DM) is associated with mild decrements in cognitive functioning, but the relation of these decrements to metabolic and vascular risk factors is unclear. The present study compared the vascular risk factor profile over the preceding 16 years between T2DM patients with good cognitive functioning and those with poor cognitive functioning.

Methods The Hoorn study is a population-based cohort study on glucose metabolism and vascular disease initiated in 1989, with follow-up examinations in 1996-1998, 2000-2001 and 2005-2007. Cognitive functioning was assessed in 2005-2007. Patients who developed T2DM between 1989 and 2000-2001 (n = 64) were divided in tertiles (lowest tertile= 'poor cognition', highest tertile = 'good cognition') according to a sum score for performance across cognitive domains (SUM) and the domain score for information-processing speed (IPS). The time course of vascular risk factors from 1989 to 2005-2007 was compared between these tertiles with linear mixed models adjusted for age, sex and estimated IQ.

Results Present levels (2005-2007) of vascular risk factors did not differ between patients with relatively poor or good cognition. However, patients with poor cognition had a 14-18 mmHg higher systolic blood pressure in 1989 than patients with good cognition. There were no differences in lipid profile and body weight at any time during the study between the groups. For IPS the T2DM patients with poor cognition even had a lower baseline HbAlc level than patients with good cognition.

Conclusions Cognitive dysfunction in T2DM is related to the cumulative effects of long-term exposure to hypertension, even in pre-DM stages. Ltd. Copyright (C) 2009 John Wiley & Sons,

Original languageEnglish
Pages (from-to)657-664
Number of pages8
JournalDiabetes-Metabolism Research and Reviews
Volume25
Issue number7
Early online date18 Sep 2009
DOIs
Publication statusPublished - Oct 2009
Externally publishedYes

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