Insurance Selection BiasSelection BiasInsurance, HealthInsurance CoverageBias (Epidemiology)GovernmentSelection, GeneticInsuranceInsurance, Long-Term CareInsurance, LifeInsurance CarriersUnited StatesUniversal CoverageInsurance PoolsFinancing, GovernmentMedically UninsuredFederal GovernmentInsurance BenefitsPatient SelectionInsurance, DentalHealth Care ReformInsurance, Health, ReimbursementNational Health ProgramsLocal GovernmentPrivate SectorHealth Benefit Plans, EmployeeHealth Services AccessibilityNational Health Insurance, United StatesReference StandardsMedicaidGovernment RegulationResearch DesignInsurance, LiabilityInsurance Claim ReportingInsurance, Major MedicalHealth ExpendituresState GovernmentState Health PlansSocioeconomic FactorsGovernment AgenciesHealth PolicyEligibility DeterminationInsurance, AccidentHealthy Worker EffectModels, StatisticalCohort StudiesReproducibility of ResultsLogistic ModelsMedicareRetrospective StudiesGovernment ProgramsInsurance, HospitalizationRisk FactorsFees and ChargesReference ValuesEpidemiologic Research DesignPropensity ScoreHealth Services ResearchMedical AssistanceTime FactorsPoliticsData CollectionHealth Insurance Portability and Accountability ActPatient Protection and Affordable Care ActInsurance Claim ReviewCost SharingAge FactorsInsurance, Pharmaceutical ServicesConfounding Factors (Epidemiology)Data Interpretation, StatisticalPublication Bias