DeliriumPostoperative ComplicationsIncidenceSurgical Procedures, ElectiveArteriosclerosis ObliteransDeep SedationHydromorphoneRisk FactorsCognition DisordersPerioperative PeriodProspective StudiesAlcohol Withdrawal DeliriumMyocytes, CardiacCardiac Surgical ProceduresHypnotics and SedativesIntensive Care UnitsSurgical Procedures, OperativeHip FracturesOximetryAnesthesia, GeneralCardiac OutputMethyl EthersTime FactorsCausalityCognitionPostoperative HemorrhagePropofolPsychiatric Status Rating ScalesAge FactorsAnesthetics, InhalationAnalgesia, Patient-ControlledPostoperative PeriodRetrospective StudiesHeartTreatment OutcomeSpinal DiseasesPreoperative CareArrhythmias, CardiacNeuropsychological TestsPredictive Value of TestsRisk AssessmentCohort StudiesNeurosurgical ProceduresDeath, Sudden, CardiacChi-Square DistributionConfusionOdds RatioCoronary Artery BypassDouble-Blind Method