The prognosis of ARDS patients was taken as the dependent variable (death = 1, survival = 0), and the significant difference factors in univariate analysis were used as independent variables, including mechanical ventilation duration (measured value), FiO2 (measured value), PaO2 (measured value), PaO2/FiO2 (measured value), Scr (measured value), serum FOXM1 (measured value), and IGF2 (measured value). This evidence concerns the gene IGF2 and acute respiratory distress syndrome.