Compared with the N-PAH group, the red blood cell (RBC) count, hemoglobin (Hb), and platelet (PLT) count were lower and serum creatinine (Scr), fasting blood glucose (FBG), and parathyroid hormone (PTH) were higher in the PAH group, and the differences were statistically significant (P < 0.05). The gene discussed is GSTM1; the disease is pulmonary arterial hypertension.