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논문분류	춘계학술대회 초록집
제목	Comparison of creatinine and cystatin C in predicting hyperphosphatemia and hyperparathyroidism in patients with chronic kidney disease
저자	Yohan Park
출판정보	2023; 2023(1):
키워드
초록	Objectives: There is no study analyzing the predictive value according to the methods of eGFR calculation in occurrences of hyperphosphatemia and secondary hyperparathyroidism, which are functional and physiological changes according to chronic kidney disease (CKD) progression. Therefore, we compared the predictive power according to the eGFR calculation methods for occurrences of hyperphosphatemia and secondary hyperparathyroidism in CKD patients, especially in patients with a large difference between eGFRCr and eGFRCysC. Methods: This study was a single center retrospective, cross-sectional study. After eligible data collection, total 639 patients with non-dialysis CKD grade 3 or higher were enrolled. The patients were divided into low- and high-discrepancy groups based on the median value of the difference between eGFRCr and eGFRCysC (6.353 mL/min/1.73m2). Multivariate logistic regression analysis was performed to find factors influencing high-discrepancy. To analyze the predictive power according to the eGFR calculation methods, the area under the receiver operating characteristic curve (AuROC) values were compared, and it was performed in overall patients, low-, and high-discrepancy groups, respectively. Results: In multivariate logistic regression analysis, age > 70 years (odd ratio (OR) 2.194, P < 0.001) and CKD grade 3 (OR 3.191, P < 0.001) were observed as significant factors for high-discrepancy. In the occurrence of hyperphosphatemia, AuROC values were observed to be higher in eGFRCysC and eGFRCr-CysC than eGFRCr in overall patients and in the high-discrepancy group, but there was no difference in the low-discrepancy group. In the occurrence of secondary hyperparathyroidism with hyperphosphatemia, AuROC values were observed to be higher in eGFRCysC and eGFRCr-CysC than in eGFRCr only in the high-discrepancy group. Conclusions: In patients with a large difference between eGFRCr and eGFRCysC, it was more useful to use eGFRCysC and eGFRCr-CysC rather than simply eGFRCr alone from the physiologic perspective of the kidney.
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