The results suggested that there was no obvious correlation of circulating level of UGT1A1 with liver fat fraction in patients with mild steatosis and moderate steatosis, but circulating UGT1A1 levels were positively associated with liver fat fraction in patients with severe steatosis (ρ = 0.305, P = 0.026) (Table 4). The gene discussed is UGT1A1; the disease is steatosis.