Hospitals, PsychiatricPsychiatric Department, HospitalCommitment of Mentally IllPatient AdmissionEmergency Services, PsychiatricCatchment Area (Health)Crisis InterventionMental DisordersHospitalizationLength of StayMental Health ServicesEnglandSchool Admission CriteriaRetrospective StudiesIntensive Care UnitsProspective StudiesHospital MortalityEmergency Service, HospitalPatient ReadmissionEmergenciesAcute DiseasePatient DischargeTime FactorsRisk Factors