We aimed to investigate the association between the onset of type 2 diabetes (T2D) and dementia incidence rates (IR) in the population with impaired glucose tolerance (IGT) identified in primary care in New Zealand (NZ) over 25 years.
Tapered matching and landmark analysis (accounting for immortal bias) were used to control for potential effects of known confounders. The association between T2D onset and 5- and 10-year IR of dementia was estimated by weighted Cox models.
The onset of T2D was significantly associated with the 10-year IR of dementia, especially in the socioeconomically deprived, those of non-NZ European ethnicity, those currently smoking, and patients with higher metabolic measures.
Our findings suggest that the onset of T2D is a significant risk factor for dementia in individuals with IGT. Dementia screening and structured diabetes prevention are vital in the population with IGT, particularly those from deprived or ethnic minority backgrounds.

Increased dementia incidence rate links with T2D onset in people with IGT.
Significant incidence varied by ethnicity, socioeconomic status, and health factors.
Results emphasize the diabetes manage and socioeconomic factors on dementia risk.
Secondary analysis highlights the key role of vascular health in dementia prevention.

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This post is Copyright: Dahai Yu,
Zheng Wang,
Uchechukwu Levi Osuagwu,
Karen Pickering,
John Baker,
Richard Cutfield,
Yamei Cai,
Brandon J. Orr‐Walker,
Gerhard Sundborn,
Bingjie Qu,
Zhanzheng Zhao,
David Simmons | June 14, 2024

Wiley: Alzheimer’s & Dementia: Table of Contents