Fig. 1

Score scatter plot and permutation test of the OPLS-DA model. A Score plots were generated from the LC–MS/MS data of umbilical cord blood plasma lipidomic profiles for both the PE and control groups. The x-axis and y-axis represent the first and second principal components, respectively, with red and blue colors indicating the respective groups. B Permutation tests were conducted using the LC–MS/MS data. In the permutation test, the x-axis represents the correlation coefficient, while the y-axis displays the values of R2Y and Q2. OPLS-DA refers to orthogonal partial least squares discriminant analysis; PE, preeclampsia