Because one single nucleotide polymorphism (SNP) in PPARD gene (rs2267668) was significantly correlated with the CKD risk, we also estimated the LD within PPARD polymorphisms, which revealed that the 3 polymorphisms in PPARD gene investigated, PPARD A65G in exon 7 (Asn163Asn) (rs2076167), PPARD T-48444C in exon 3 (rs6902123), and PPARD T-842C in exon 3 (rs2267668), were in linkage disequilibrium to each other (Figure 1). The gene discussed is PPARD; the disease is chronic kidney disease.