Patient Outcome AssessmentOutcome Assessment (Health Care)Treatment OutcomeRetrospective StudiesProspective StudiesResearch DesignQuality of LifeTime FactorsFollow-Up StudiesInjections, EpiduralDisability EvaluationHospitals, TeachingRisk AssessmentOutcome and Process Assessment (Health Care)Sports MedicineReproducibility of ResultsSeverity of Illness IndexUnited StatesRandomized Controlled Trials as TopicPatient SatisfactionHospitals, UniversityEmpirical ResearchHospitals, GeneralQuestionnairesNursing Staff, HospitalFluoroscopyActivities of Daily LivingHospital CostsRisk FactorsRecovery of FunctionSpinal StenosisCohort StudiesLength of StaySingle-Blind MethodPain MeasurementPredictive Value of TestsPrognosisHospitals, UrbanClinical Trials as TopicHealth Status IndicatorsEconomics, HospitalStrokeIntervertebral Disc DisplacementPhysical Therapy ModalitiesChronic DiseaseCost-Benefit AnalysisPregnancy OutcomeHospital Bed CapacityPilot ProjectsEducational MeasurementEvidence-Based MedicineLow Back PainHospitals, SpecialHospitals, PediatricHospitalizationLumbosacral RegionPractice Guidelines as TopicClinical ProtocolsEmergency Service, HospitalPatient SelectionRange of Motion, ArticularHospitals, District