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Determinants and outcomes of acute kidney injury among older patients undergoing invasive coronary angiography for acute myocardial infarction: The SILVER-AMI Study.
Am J Med. 2019 Jun 03;:
Authors: Dodson JA, Hajduk A, Curtis J, Geda M, Krumholz HM, Song X, Tsang S, Blaum C, Miller P, Parikh CR, Chaudhry SI
Abstract
BACKGROUND: Among older adults (age≥75) hospitalized for acute myocardial infarction, acute kidney injury after coronary angiography is common. Aging-related conditions may independently predict acute kidney injury, but have not yet been analyzed in large acute myocardial infarction cohorts.
METHODS: We analyzed data from 2212 participants age≥75 in the SILVER-AMI study who underwent coronary angiography. Acute kidney injury was defined using KDIGO criteria (serum Cr increase ≥0.3mg/dL from baseline or≥1.5 times baseline). We analyzed the associations of traditional acute kidney injury risk factors and aging-related conditions (ADL impairment, prior falls, cachexia, low physical activity) with acute kidney injury, and then performed logistic regression to identify independent predictors.
RESULTS: Participants' mean age was 81.3years, 45.2% were female, and 9.5% were nonwhite; 421 (19.0%) experienced acute kidney injury. Comorbid diseases and aging-related conditions were both more common among individuals experiencing acute kidney injury. However, after multivariable adjustment, no aging-related conditions were retained. There were 11 risk factors in the final model; the strongest were heart failure on presentation (OR 1.91, 95% CI 1.41-2.59), BMI >30 (vs. BMI 18-25: OR 1.75, 95% CI 1.27-2.42), and nonwhite race (OR 1.65, 95% CI 1.16-2.33). The final model achieved an AUC of 0.72 and was well calibrated (Hosmer-Lemeshow P=0.50). Acute kidney injury was independently associated with 6month mortality (OR 1.98, 95% CI 1.36-2.88) but not readmission (OR 1.26, 95% CI 0.98-1.61).
CONCLUSIONS: Acute kidney injury is common among older adults with acute myocardial infarction undergoing coronary angiography. Predictors largely mirrored those in previous studies of younger individuals, which suggests that geriatric conditions mediate their influence through other risk factors.
PMID: 31170374 [PubMed - as supplied by publisher]