Patient AdmissionOffice VisitsHospitalizationRetrospective StudiesProspective StudiesLength of StaySchool Admission CriteriaTime FactorsTreatment OutcomeUnited StatesRisk FactorsGerminal CenterIntensive Care UnitsCohort StudiesHospital MortalityPatient ReadmissionChild Day Care CentersEmergency Service, HospitalEmergenciesAmbulatory CareFollow-Up StudiesTrauma CentersSeverity of Illness IndexAcute DiseaseInfant, NewbornPatient DischargeTertiary Care CentersCommunity Health CentersHouse CallsEnglandLogistic ModelsAge FactorsOutcome Assessment (Health Care)Hospitals, PsychiatricIncidencePrognosisHospitalsIntensive CareReferral and ConsultationUtilization ReviewBed OccupancyCollege Admission TestMultivariate AnalysisWounds and InjuriesCommitment of Mentally IllInpatientsDiagnosis-Related GroupsPredictive Value of TestsRegression AnalysisHealth Care SurveysCross-Sectional StudiesAdmitting Department, HospitalRisk AssessmentEmergency Medical ServicesHospitals, GeneralAsthmaCritical IllnessIntensive Care Units, PediatricPrimary Health CarePoison Control CentersHospitals, TeachingSeasonsPrevalenceCenters for Disease Control and Prevention (U.S.)OntarioAge DistributionPhysician's Practice PatternsHospitals, UrbanHospital CostsSocioeconomic FactorsOutpatient Clinics, HospitalPatient TransferMyocardial InfarctionHealth Services AccessibilityHospitals, PublicSex FactorsGreat BritainHealth Care CostsMedical RecordsPatient SatisfactionComorbidityOutcome and Process Assessment (Health Care)LondonHealth Services ResearchPoisoningQuality of Health CareHospitals, DistrictTriagePregnancyQuestionnairesChi-Square DistributionEmergency TreatmentOdds RatioHome Care ServicesRespiratory Tract DiseasesStrokeAmbulatory Care FacilitiesAPACHEPneumoniaMedical Audit