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Glycemic Dysregulations Are Associated With Worsening Cognitive Function in Older Participants at High Risk of Cardiovascular Disease: Two-Year Follow-up in the PREDIMED-Plus Study

Carlos Gómez-Martínez, Nancy Babio, Jordi Júlvez, Nerea Becerra-Tomás, Miguel Á Martínez-González, Dolores Corella, Olga Castañer, Dora Romaguera, Jesús Vioque, Ángel M Alonso-Gómez, Julia Wärnberg, José A Martínez, Luís Serra-Majem, Ramón Estruch, Francisco J Tinahones, José Lapetra, Xavier Pintó, Josep A Tur, José López-Miranda, Aurora Bueno-CavanillasJosé J Gaforio, Pilar Matía-Martín, Lidia Daimiel, Vicente Martín-Sánchez, Josep Vidal, Clotilde Vázquez, Emilio Ros, Søren Dalsgaard, Carmen Sayón-Orea, José V Sorlí, Rafael de la Torre, Itziar Abete, Lucas Tojal-Sierra, Francisco J Barón-López, Noelia Fernández-Brufal, Jadwiga Konieczna, Antonio García-Ríos, Emilio Sacanella, M Rosa Bernal-López, José M Santos-Lozano, Cristina Razquin, Andrea Alvarez-Sala, Albert Goday, M Angeles Zulet, Jessica Vaquero-Luna, Javier Diez-Espino, Aida Cuenca-Royo, Fernando Fernández-Aranda, Mònica Bulló, Jordi Salas-Salvadó

15 Citations (Scopus)

Abstract

Introduction: Type 2 diabetes has been linked to greater cognitive decline, but other glycemic parameters such as prediabetes, diabetes control and treatment, and HOMA-IR and HbA1c diabetes-related biomarkers have shown inconsistent results. Furthermore, there is limited research assessing these relationships in short-term studies. Thus, we aimed to examine 2-year associations between baseline diabetes/glycemic status and changes in cognitive function in older participants at high risk of cardiovascular disease.

Methods: We conducted a 2-year prospective cohort study (n=6,874) within the framework of the PREDIMED-Plus study. The participants (with overweight/obesity and metabolic syndrome; mean age 64.9 years; 48.5% women) completed a battery of 8 cognitive tests, and a global cognitive function Z-score (GCF) was estimated. At baseline, participants were categorized by diabetes status (no-diabetes, prediabetes, and <5 or ≥5-year diabetes duration), and also by diabetes control. Furthermore, insulin resistance (HOMA-IR) and glycated hemoglobin (HbA1c) levels were measured, and antidiabetic medications were recorded. Linear and logistic regression models, adjusted by potential confounders, were fitted to assess associations between glycemic status and changes in cognitive function.

Results: Prediabetes status was unrelated to cognitive decline. However, compared to participants without diabetes, those with ≥5-year diabetes duration had greater reductions in GCF (β=-0.11 (95%CI -0.16;-0.06)], as well as in processing speed and executive function measurements. Inverse associations were observed between baseline HOMA-IR and changes in GCF [β=-0.0094 (95%CI -0.0164;-0.0023)], but also between HbA1c levels and changes in GCF [β=-0.0085 (95%CI -0.0115, -0.0055)], the Mini-Mental State Examination, and other executive function tests. Poor diabetes control was inversely associated with phonologic fluency. The use of insulin treatment was inversely related to cognitive function as measured by the GCF [β=-0.31 (95%CI -0.44, -0.18)], and other cognitive tests.

Conclusions: Insulin resistance, diabetes status, longer diabetes duration, poor glycemic control, and insulin treatment were associated with worsening cognitive function changes in the short term in a population at high cardiovascular risk.

Clinical Trial Registration: http://www.isrctn.com/ISRCTN89898870, identifier ISRCTN: 89898870.

Original languageEnglish
Article number754347
JournalFrontiers in Endocrinology
Volume12
ISSN1664-2392
DOIs
Publication statusPublished - 29 Oct 2021
Externally publishedYes

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