The tested SNP of MCP-1 gene, concretely the presence of the mutant G allele, statistically significantly correlated with the higher serum level of hsCRP in patients with IHD (P = .016; in men: P = .060; in women: P = .197), AP (P = .004; in men: P = .019; in women: P = .091) and HT (P = .013; in men: P = .047; in women: P = .122, Tables 2  and 3). The gene discussed is CCL2; the disease is hematocrit.