By using the dominant model, the factors associated with steatosis included carriage of the PNPLA3 rs738409 CG/GG genotype (OR/CI:1.31/1.013–1.703, P = 0.04), BMI (OR/CI: 1.13/1.084–1.169, P < 0.001) and age (OR/CI:1.02/1.004–1.028, P = 0.006). The gene discussed is PNPLA3; the disease is steatosis.