Abstract
IntroductionAcute kidney injury (AKI) is associated with chronic kidney disease (CKD) and cardiovascular disease (CVD), but it is unclear whether AKI duration affects the long-term risks of CKD and CVD. Therefore, we performed a population-based cohort study examining the associations between AKI duration and CKD and CVD. MethodsWe identified patients with laboratory-recorded AKI in Denmark from 1990 through 2018. AKIs were categorized as rapid reversal AKI (≤48 hours), persistent AKI (2-7 days), and acute kidney disease (AKD) (>7 days). We estimated 20-year risks and adjusted hazard ratios (aHRs) of incident CKD and CVD. ResultsThe study comprised 169,582 patients with AKI, with 100,478 and 76,838 included in the analysis of CKD and CVD, respectively. The 20-year risks of CKD were 26.3%, 29.5%, and 28.7% for rapid reversal AKI, persistent AKI, and AKD, respectively. Compared with rapid reversal AKI, aHRs were 1.13 (95% CI, 1.08-1.19) for persistent AKI and 1.36 (95% CI, 1.30-1.41) for AKD.Risks and rates of overall CVD were similar for rapid reversal AKI, persistent AKI, and AKD. However, persistent AKI was associated with a slightly increased aHR of heart failure [1.09 (95% CI, 1.02-1.16)], while aHRs of heart failure, ischemic heart disease, and peripheral artery disease were slightly increased for AKD [1.09 (95% CI, 1.03-1.15), 1.11 (95% CI, 1.03-1.19), and 1.10 (95% CI, 1.02-1.17), respectively]. ConclusionAKI duration was associated with development of CKD, but not overall CVD; however, rates of heart failure, ischemic heart disease, and peripheral artery disease increased slightly with AKI duration.
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