ALB and autosomal dominant polycystic kidney disease: After water loading, albumin excretion rate increased in the two patient groups compared to healthy controls (0.002 [0.000; 0.007] mg/min in ADPKD, 0.012 [0.002; 0.041] mg/min in non-ADPKD vs. 0.000 [0.000; 0.001] mg/min in healthy controls, p=0.05 and p < 0.001, respectively).