Atorvastatin/therapeutic use; Cardiovascular Diseases/prevention & control; Hypercholesterolemia/drug therapy; Myocardial Infarction/blood; Pravastatin/therapeutic use; Aged; Atorvastatin/chemistry; Atorvastatin/pharmacokinetics; Cardiovascular Diseases/epidemiology; Cardiovascular Diseases/etiology; Cholesterol/classification; Cholesterol, LDL/blood; Female; Glycated Hemoglobin/analysis; Heart Failure/epidemiology; Heart Failure/prevention & control; Hospitalization/statistics & numerical data; Humans; Hydrophobic and Hydrophilic Interactions; Hypercholesterolemia/blood; Hypercholesterolemia/complications; Japan/epidemiology; Kaplan-Meier Estimate; Lipids/blood; Male; Middle Aged; Mortality; Myocardial Infarction/epidemiology; Myocardial Infarction/etiology; Myocardial Revascularization/statistics & numerical data; Patient Acceptance of Health Care; Pravastatin/chemistry; Pravastatin/pharmacokinetics; Recurrence; Single-Blind Method; Solubility