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The FDA recently approved a laboratory test for determining a patient's risk of developing acute kidney injury (AKI). In this test, increases in urinary levels of tissue inhibitor of metalloproteinase 2 (TIMP-2) and insulin-like growth factor binding protein 7 (IGFBP-7) are predictive of AKI. Based on the plot, where light gray bars represent patients with AKI based on Kidney Disease: Improving Global Outcomes classification and the dark gray bars represent patients without AKI, what can be concluded about this new test's usefulness in patients pre-surgery (1), immediately after surgery (2), 4 hours after surgery (3), and the first postoperative morning (4)?

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The FDA recently approved a laboratory test for determining a patient's risk of developing acute kidney injury (AKI). In this test, increases in urinary levels of tissue inhibitor of metalloproteinase 2 (TIMP-2) and insulin-like growth factor binding protein 7 (IGFBP-7) are predictive of AKI. Based on the plot, where light gray bars represent patients with AKI based on Kidney Disease: Improving Global Outcomes classification and the dark gray bars represent patients without AKI, what can be concluded about this new test's usefulness in patients pre-surgery (1), immediately after surgery (2), 4 hours after surgery (3), and the first postoperative morning (4)?<br><img src='https://www.fatskills.com/images3/mcat/047b.tiff.gif'>






 
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