highly significantP < 0.01
Significant interaction relationships were observed; the fatty aldehyde biomarker pos_15014 showed highly significant positive correlations ( r ≥ 0.99, P < 0.01) with 12 lipid molecules (e.g., pos_14867, pos_15043, and pos_5011) while showing significant negative correlations ( r ≤ −0.97) with two lipids, such as pos_6186 and pos_14505.