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Fig. 3 | BMC Urology

Fig. 3

From: Clinical relevance of aortic calcification in urolithiasis patients

Fig. 3

Correlation eGFR and aortic calcification index (ACI), chronic kidney disease (CKD), and receiver operating characteristic curve (ROC) analysis for predictive accuracy of stage 3B chronic kidney disease. ACI and eGFR showed significant, but weak correlations in the Stone (R2 = 0.053, P < 0.001) and Non-stone group (R2 = 0.032, P = 0.029) (a). The number of patients with stage 3B CKD was significantly higher in the Stone group compared with the Non-stone group (12% vs. 4%, P = 0.008), although the number of patients with stage 3 CKD was not significantly different (b). The number of patients with stage 3 and 3B CKD was significantly higher in uric stone containing patients compared with calcium oxalate (CaOx) and/or calcium phosphate (CaP) stone patients (c). The optimal ACI cut-off value of age and ACI for stage 3B CKD was determined by analyzing ROC curves using the area under the curve (AUC) (d). An age of 65 years (AUC = 0.70; P < 0.001; 95% CI: 0.62–0.78, blue line) and ACI of 13.0% (AUC = 0.68; P < 0.001; 95% CI: 0.59–0.76, green line) were used as the cut-off values in this study

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