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Cognitive function, insulin-dependent diabetes and hypoglycaemia.

C Sachon1, A Grimaldi, J P Digy

  • 1Service Diabetologie, C.H.U. Pitie, Paris, France.

Journal of Internal Medicine
|May 1, 1992
PubMed
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Cognitive function, including memory and attention, is impaired in insulin-dependent diabetes (IDD) patients. Severe hypoglycaemia episodes may cause permanent memory deficits in individuals with diabetes.

Area of Science:

  • Neuroscience
  • Endocrinology
  • Psychology

Background:

  • Insulin-dependent diabetes (IDD) is a chronic condition requiring careful management.
  • Cognitive function can be affected by metabolic disturbances associated with diabetes, particularly hypoglycaemia.

Purpose of the Study:

  • To evaluate the impact of insulin-dependent diabetes and hypoglycaemia awareness on cognitive performance.
  • To assess specific cognitive domains including concentration, attention, fluency, memory, and psychomotor speed.

Main Methods:

  • Seven psychometric tests were administered to 25 non-diabetic controls and 55 IDD patients.
  • IDD patients were divided into two groups: unaware (Group I) and aware (Group II) of hypoglycaemia.
  • Cognitive performance was compared between groups and with controls.

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Main Results:

  • IDD patients, especially Group I, showed significantly lower scores in psychomotor speed, selective attention, lexical fluency, and wordlist learning compared to controls.
  • Group I performed worse than Group II in word memorizing.
  • Overall, IDD patients exhibited reduced cognitive performance, with Group II scoring 67% and Group I scoring 80% of control levels.

Conclusions:

  • Chronic hyperglycaemia and severe hypoglycaemia negatively impact cognitive functions in IDD patients.
  • Frequent and severe hypoglycaemic episodes may lead to lasting memory impairments.