The practical value of chronic kidney disease epidemiology collaboration formulas in the evaluation of renal function in elderly patients with hypertension / 中华老年医学杂志

ABSTRACT

Objective:To investigate differences in the value of three chronic kidney disease epidemiology collaboration(CKD-EPI)estimation formulas in the evaluation of renal function damage in elderly patients with hypertension.Methods:A total of 58 patients with essential hypertension over 65 years of age were enrolled from November 2018 to March 2019 in this retrospective analysis.Patients with abnormal results in one or more items out of serum creatinine(Scr), blood urea nitrogen and urine protein were included in the hypertensive renal damage group(the positive group, n=25)and patients without abnormal results were included in the simple hypertensive group(the negative group, n=33). We measured Scr and cystatin c(Cys C)levels in fasting blood for each group.The estimated glomerular filtration rates(eGFR Scr, eGFR Cys C and eGFR Scr-Cys C)were calculated using the CKD-EPI formulas. Results:There was no statistically significant difference in gender, age, body mass index, grade of hypertension, onset time of hypertension, total cholesterol and triglycerides between the two groups( P> 0.05). There were significant differences in Cys C, eGFR Scr, eGFR Cys C and eGFR Scr-Cys C between the two groups( P<0.05). Spearman correlation analysis showed that Cys C was positively correlated with Scr( r=0.427, P<0.01), serum urate( r=0.266, P<0.05)and blood urea nitrogen( r=0.357, P<0.01)and was negatively correlated with eGFR Scr( r=-0.369, P<0.01), eGFR Cys C( r=-0.982, P<0.01)and eGFR Scr-Cys C( r=-0.845, P<0.01). Of the three formulas, eGFRScr-Cys C had the largest area under the receiver operating characteristic(ROC)curve(AUC)and its value was 0.707(0.565, 0.849). Conclusions:For the three estimation formulas, CKD-EPI Scr-Cys C has slightly better diagnostic efficiency than the others and may help improve the diagnosis of renal damage in elderly patients with hypertension.