GSTM1 and pericardial effusion: Univariate analysis revealed significant differences between the case andcontrol groups for the following variables: age, length of stay, hypertension,diabetes, coronary heart disease, old myocardial infarction, stroke, peripheralvascular disease, Killip ≥III, heart failure, lung infection, renalinsufficiency, hypoproteinemia, hyperuricemia, diastolic blood pressure, heartrate, ejection fraction, pericardial effusion, aortic valve regurgitation, TG,TC, LDL-C, INR, FDP, Hb, PLT, MPV, NEUT%, NEUT (p < 0.05).