Journal
DIABETES RESEARCH AND CLINICAL PRACTICE
Volume 201, Issue -, Pages -Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.diabres.2023.110721
Keywords
Dementia; Cumulative effect; Cumulative HbA1c; mean HbA1c over time; Long-term glycemic exposure; Type 2 diabetes mellitus
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This study examines the cumulative effects of long-term glycemic exposure on the development of dementia in patients with type 2 diabetes mellitus. The results show that poorly controlled blood sugar is associated with an increased risk of developing dementia, and higher cumulative glycemic exposure may lead to a shorter time to dementia onset.
Aims: We examined cumulative effects of long-term glycemic exposure in patients with type 2 diabetes mellitus (T2DM) on the development of dementia.Methods: The study involved 20,487 records of patients with T2DM identified in the electronic medical record at Severance Hospital, Korea. Cumulative HbA1c (AUCHbA1c) and mean HbA1c over time (HbA1cavg) as measures of long-term glycemic exposure were compared for the development of dementia and the time to dementia.Results: AUCHbA1c and HbA1cavg were significantly higher in patients who later developed dementia than in those who did not (AUCHbA1c: 56.2 & PLUSMN; 26.4 vs. 52.1 & PLUSMN; 26.1 %Year; HbA1cavg: 7.3 & PLUSMN; 1.0 vs. 7.0 & PLUSMN; 1.0%). Odds ratio of dementia increased when HbA1cavg was 7.2% (55 mmol/mol) or above, and when AUCHbA1c was 42 %Year (e.g., HbA1c 7.0% maintained for 6 years) or above. Among those who developed dementia, as HbA1cavg increased, the time to dementia onset decreased (& beta; =-380.6 days, 95% confidence interval [CI]:-416.2 to-345.0).Conclusions: Our results indicate poorly controlled T2DM was associated with an increased risk of developing dementia, as measured by AUCHbA1c and HbA1cavg. Higher cumulative glycemic exposure may lead to devel-oping dementia in a shorter time.
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