Resistive indices of left (A) and right (B) common and internal carotid arteries of study groups. Data were expressed as mean ±SD. LCCA, left common carotid artery; LICA left internal carotid artery; RCCA, Right common carotid artery; RICA, right internal carotid artery; ADPKD, adult polycystic kidney disease; PD, peritoneal dialysis; HD, hemodialysis. a,cP<0.05 vs. normal, ADPKD, and PD groups. b,dP<0.05 vs. normal group.