Preoperative CarePreoperative PeriodHospitals, TeachingOutpatient Clinics, HospitalRetrospective StudiesHospitals, UniversityHospitals, GeneralHospital CostsHospitals, UrbanPostoperative ComplicationsNursing Staff, HospitalEconomics, HospitalHospitals, SpecialProspective StudiesHospitals, PediatricLength of StayHospitals, DistrictHospital Bed CapacityTreatment OutcomeAmbulatory Care FacilitiesFollow-Up StudiesHospitals, PrivateTime FactorsFinancial Management, HospitalEmergency Service, HospitalRisk FactorsHospital ChargesHospital PlanningHospitalizationHospital DepartmentsPostoperative PeriodHospitals, PsychiatricRectal NeoplasmsHospital RecordsHospital UnitsPredictive Value of TestsDental ClinicsPrognosisSurgical Procedures, OperativeEquipment and Supplies, HospitalSurgery Department, HospitalPatient DischargeTomography, X-Ray ComputedLibraries, HospitalQuestionnairesHospitals, CountyPatient AdmissionUnited StatesHospital Bed Capacity, 500 and over