Aged Aged, 80 and over Cardiology--statistics & numerical data Cohort Studies Contraindications Drug Prescriptions--statistics & numerical data Drug Utilization--standards Drug Utilization Review--methods Drug-Related Side Effects and Adverse Reactions Female Geriatrics--statistics & numerical data Hospitalists--statistics & numerical data Hospitals--statistics & numerical data Humans Inpatients Logistic Models Male Pharmaceutical Preparations Pharmacoepidemiology Practice Patterns, Physicians'--statistics & numerical data Retrospective Studies United States