Kidney medicine · 2024
Acute Kidney Injury, Mild Cognitive Impairment, and Dementia: A Cohort Study of Patients from SPRINT.
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Nowak Kristen L, Ostrow Anna, Oh Ester S, You Zhiying, Chonchol Michel
Аннотация
RATIONALE & OBJECTIVE: It is well accepted that acute cognitive dysfunction and delirium can occur with severe acute kidney injury (AKI). Recent evidence has indicated AKI can contribute to incident dementia years later. However, these observations were limited by lack of adjudication in most of these studies and greater severity of AKI.
STUDY DESIGN: A retrospective cohort study.
SETTING & PARTICIPANTS: 8,148 older adults at high cardiovascular risk enrolled in the Systolic Blood Pressure Intervention Trial (SPRINT).
PREDICTOR: Adjudicated AKI as a time-varying predictor.
OUTCOMES: Incident mild cognitive impairment (MCI), probable dementia, and their composite.
ANALYTICAL APPROACH: Cox proportional hazard models.
RESULTS: Participants were 68 ± 9 years, 65% male, 28% with prevalent chronic kidney disease), with a median (interquartile range) follow-up time for the composite of 4.0 (2.1-5.4) and 4.6 (3.6-5.9) years in the AKI and non-AKI groups, respectively. The incidence rate of MCI, probable dementia, and their composite was higher in participants who experienced an AKI event (n = 270). In the fully adjusted model, AKI was positively associated with probable dementia (hazard ratio, 1.72; 95% CI, 1.07-2.75) and the composite outcome (1.43 [1.01-2.04]).
LIMITATIONS: AKI before baseline was not captured; retrospective and associative.
CONCLUSIONS: Adjudicated AKI, which was largely mild and reversible, was independently associated with increased risk of probable dementia and the composite of probable dementia and MCI in older adults at high cardiovascular risk.
STUDY DESIGN: A retrospective cohort study.
SETTING & PARTICIPANTS: 8,148 older adults at high cardiovascular risk enrolled in the Systolic Blood Pressure Intervention Trial (SPRINT).
PREDICTOR: Adjudicated AKI as a time-varying predictor.
OUTCOMES: Incident mild cognitive impairment (MCI), probable dementia, and their composite.
ANALYTICAL APPROACH: Cox proportional hazard models.
RESULTS: Participants were 68 ± 9 years, 65% male, 28% with prevalent chronic kidney disease), with a median (interquartile range) follow-up time for the composite of 4.0 (2.1-5.4) and 4.6 (3.6-5.9) years in the AKI and non-AKI groups, respectively. The incidence rate of MCI, probable dementia, and their composite was higher in participants who experienced an AKI event (n = 270). In the fully adjusted model, AKI was positively associated with probable dementia (hazard ratio, 1.72; 95% CI, 1.07-2.75) and the composite outcome (1.43 [1.01-2.04]).
LIMITATIONS: AKI before baseline was not captured; retrospective and associative.
CONCLUSIONS: Adjudicated AKI, which was largely mild and reversible, was independently associated with increased risk of probable dementia and the composite of probable dementia and MCI in older adults at high cardiovascular risk.