Association between prediabetes and cognitive function in Parkinson's disease. Issue 1 (30th November 2022)

• Record Type: Journal Article
• Authors: Park, Joah; Choi, Seohee; Kim, Ryul
• Is Part Of: Brain and behavior. Volume 13:Issue 1(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-30
• Subjects: cognition -- diabetes -- Parkinson's disease -- prediabetes; Neurology -- Periodicals; Neurosciences -- Periodicals; Psychology -- Periodicals; Psychiatry -- Periodicals; 616.8005
• DOI: 10.1002/brb3.2838
• Languages: English
• ISSNs: 2162-3279

Abstract

Abstract: Introduction: It remains largely unknown whether prediabetes is related to cognitive impairment in Parkinson's disease (PD). This study aimed to assess the association between prediabetes and cognitive function in PD patients. Methods: In this cross‐sectional study, 262 PD patients (age, 69.8 ± 10.3 years; Hoehn–Yahr stage, 2.3 ± 0.8) were classified into diabetes (glycated hemoglobin [HbA1c] ≥6.5% or previously diagnosed, n = 76), prediabetes (5.7%–6.4%, n = 90), or diabetes free (≤5.6%, n = 96) groups. Cognitive function was measured using the Montreal Cognitive Assessment (MoCA) test. Results: Both the diabetes and prediabetes groups had significantly lower MoCA scores (17.0 ± 6.6 and 18.0 ± 6.1, respectively) than the diabetes free group (20.0 ± 5.7), even after adjusting for potential confounders ( p = .002 and p = .008, respectively). In the combined group of prediabetes and diabetes free patients, higher HbA1c levels significantly correlated with lower MoCA scores ( p = .031). There was a significant interaction of diabetes status with age, but not with the duration of PD, on cognitive function. Conclusion: In addition to diabetes, prediabetes may negatively affect cognitive function in PD patients. Further prospective longitudinal studies are necessary to clarify the impact of prediabetes on the cognitive trajectory of these patients. Abstract : In addition to diabetes, prediabetes was associated with poorer cognitive function in PD patients, even after adjusting for multiple confounding factors. This observation was supported by a significant negative correlation between HbA1c levels and cognitive performance in PD patients without diabetes. The impact of diabetes status on cognition was influenced by age, but not PD duration.