Assessment of the efficacy of ChatGPT responses to bacterial species-specific questions in microbiology.

By 2060, the burden of dementia, including Alzheimer's disease (AD) and vascular dementia, is expected to double in the United States due to increases in life expectancy and population aging. Modifiable vascular risk factors, such as hypertension and diabetes, play a critical role in contributing to dementia risk across the life course. Evidence suggests that between 14% and 44% of dementia cases are directly attributable to risk factors such as elevated low‐density lipoprotein (LDL) cholesterol, diabetes, hypertension, smoking, and obesity., Increased arterial stiffness, a marker of vascular aging, results from a reduction in arterial elastin content, deposition of collagen, and arterial wall calcification. Although this process occurs in part as a result of common vascular risk factors for dementia (i.e., hypertension), age‐related structural remodeling of the arterial wall independent of other vascular risk factors also significantly contributes to arterial stiffness. Carotid‐femoral pulse wave velocity (cfPWV), a measure of arterial stiffness, may be inversely associated with brain health due to resulting cerebral microvascular dysfunction, reduced blood flow, and structural brain damage,, but the mechanisms underlying this association are unclear. Examination of the components of pulse wave velocity (PWV), including structural PWV, which reflects remodeling of the arterial wall, and load‐dependent PWV, which reflects the effects of elevated blood pressure, may elucidate the mechanisms linking arterial stiffness with dementia. Recent studies have found that cfPWV and structural PWV are associated with cognitive impairment, and markers of brain pathology typically associated with dementia., However, evidence of longitudinal associations between PWV measures and incident dementia is sparse., Studies that have estimated longitudinal associations of PWV with incident dementia have primarily examined small, racially homogeneous samples and used less robust methods of addressing informative attrition., In this study, we used data from the Atherosclerosis Risk in Communities (ARIC) Neurocognitive Study (ARIC‐NCS), a community‐based cohort study of predominantly Black or White adults, to explore associations of arterial stiffness, measured through cfPWV, with subsequent incident dementia. We hypothesized that higher cfPWV would be associated with increased incidence of dementia over approximately 9 years of follow‐up, independent of vascular risk factors. We also investigated associations of total, structural, and load‐dependent PWV with incident dementia to provide insight into the arterial stiffness mechanisms driving the relationship between cfPWV and dementia risk and to strengthen evidence for arterial stiffness as a dementia risk factor independent of other established vascular risk factors. In addition, we hypothesized that higher total, structural, and load‐dependent PWV would each be associated with increased incidence of dementia. Finally, we examined whether the relationship between PWV measures and incident dementia varied by age, race, sex, education, baseline hypertension status, or the presence of apolipoprotein E () ε4 alleles.