AHSG and autosomal dominant polycystic kidney disease: Urinary Fetuin-A levels of advanced ADPKD (eGFR < 60 ml/min/1.73 m2) showed the highest AUC (0.87, p < 0.0001) and that Fetuin-A values at 12.2 μg/mmol creatinine distinguished patients from healthy controls with 94% of sensitivity and 74% of specificity.