Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 47 3 2018 03 04 367 372 Jian ZHANG Dept. of Obstetrical, Binzhou Central Hospital, Binzhou, Shandong, China Ning LI Dept. of Obstetrical, Binzhou Central Hospital, Binzhou, Shandong, China Wenling GUO Dept. of Obstetrical, Binzhou Central Hospital, Binzhou, Shandong, China Chuanyan MA Dept. of Obstetrical, Binzhou Central Hospital, Binzhou, Shandong, China Guangcheng ZHAO Dept. of Imaging, Binzhou Central Hospital, Binzhou, Shandong, China 2018 03 04 2018 03 04 Background: We aimed to explore the diagnostic value of urinary microalbumin (mALB) level in postpartum acute kidney injury. Methods: A total of 127 maternity patients were selected from December 2013 to January in 2016 in Binzhou Central Hospital, Binzhou, Shandong, China and divided into two groups: the kidney injury and normal kidney group. The dynamic changes and diagnostic value of urine microprotein in postpartum acute kidney injury were analyzed. Results: The postpartum mean arterial pressure of maternity patients in the kidney injury group was 104.3 ± 11.6 mmHg, which was significantly higher than that of the normal kidney group (P<0.05). The mean age of the kidney injury group was 32.3 ± 11.6 years, which was significantly higher than that of the normal kidney group (P=0.006). In the kidney injury group, the postpartum glomerular filtration rate (GFR) was 78.4 ± 11.5 mL/min, which was significantly lower than the normal group (P=0.001), and urinary microalbumin was 2.87 ± 1.24 mg/mmol·Cr. The difference was statistically significant (P=0.002). mALB/GFR, Cr, urinary mALB, and GFR were the independent risk factors of postpartum acute kidney injury. The area under the ROC curve for mALB/GFR was 0.759, whereas the area under the ROC curve for Cr was 0.681, which was smaller (P = 0.042). The area under the ROC curve of mALB was 0.785 (P=0.027), which was close to the area under the ROC curve of mALB/GFR. Conclusion: Urinary mALB test is noninvasive and has high diagnostic value for postpartum kidney injury.     https://ijph.tums.ac.ir/index.php/ijph/article/view/12683 https://ijph.tums.ac.ir/index.php/ijph/article/download/12683/5922