Correlation analysis of abnormal coagulation indices and HDP severity. A-C: Pearson correlation between SBP with D-D (r=0.556, P < 0.001), APTT (r=-0.471, P < 0.001), and PT (r=-0.507, P < 0.001). D-F: Pearson correlation between UPro with D-D (r=0.597, P < 0.001), APTT (r=-0.522, P < 0.001), and PT (r=-0.597, P < 0.001). APTT, Activated Partial Thromboplastin Time; D-D, D-Dimer; PT, Prothrombin Time; SBP, Systolic blood pressure; UPro, Urine Protein; HDP, hypertensive disorders in pregnancy.