Cognitive impairment in nondiabetic middle-aged and older adults is associated with insulin resistance.
To determine whether the cognitive impairments observed in adults with type 2 diabetes mellitus (T2DM) exist in preclinical disease, we compared 38 adult participants with evidence of insulin resistance (IR) to 54 age-, gender-, and education-matched control participants on a battery of neuropsychological tests. We found that participants with IR had performance reductions in declarative memory and executive functioning. When we examined IR simultaneously with other biomedical indicators with which it co-occurs, only IR itself was associated with declarative memory, and hemoglobin A1c (HbA1c) was associated with executive functioning and working memory. We conclude that individuals with insulin resistance already demonstrate similar reductions in cognitive performance as those described in T2DM.
Department of Psychiatry, New York University School of Medicine, New York, NY 10016, USA.
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H
Bruehl
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Sweat
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J
Hassenstab
V
V
Polyakov
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Convit
D000367:Age Factors; D000368:Aged; D000375:Aging; D001786:Blood Glucose / Q000378:metabolism; D016022:Case-Control Studies; D003072:Cognition Disorders / Q000503:physiopathology*; D056344:Executive Function / Q000502:physiology; D005260:Female; D006442:Glycated Hemoglobin / Q000378:metabolism; D006801:Humans; D007333:Insulin Resistance / Q000502:physiology; D008297:Male; D008568:Memory / Q000502:physiology; D008875:Middle Aged; D009483:Neuropsychological Tests; D012737:Sex Factors
D001786:Blood Glucose; D006442:Glycated Hemoglobin; C517652:hemoglobin A1c protein, human