Utilization of in-patient services by the elderly.
D000367:Age Factors; D000368:Aged; D005191:Family Characteristics; D005853:Geriatrics; D006748:Hospital Departments; D006760:Hospitalization; D006769:Hospitals, General / Q000706:statistics & numerical data*; D006801:Humans; D007902:Length of Stay; D006278:Medicare; D009519:New York City; D044469:Racial Groups; D012067:Religion; D012737:Sex Factors; D012947:Social Work / Q000706:statistics & numerical data; D012959:Socioeconomic Factors