Cross-Sectional StudiesProspective StudiesCohort StudiesIntensive Care Units, PediatricRisk FactorsInternal MedicineAcute Lung InjuryAge FactorsCanadaRetrospective StudiesSex FactorsSocial ClassSocioeconomic FactorsEnglandLogistic ModelsTime FactorsInfant, NewbornHealth StatusRandom AllocationSmokingPrevalenceQuestionnairesPregnancyFollow-Up StudiesUnited StatesOdds RatioTime-to-PregnancyMortalityRegression AnalysisMultivariate AnalysisTreatment OutcomeSemen AnalysisCase-Control StudiesIncidenceLungAsthmaCritical CareLondonResidence CharacteristicsRandomized Controlled Trials as TopicUrban HealthCritical IllnessSeverity of Illness IndexSwedenHealth Status IndicatorsHealth SurveysIntensive Care UnitsScotlandAge DistributionEducational StatusGreat BritainPhysician-Patient RelationsLongitudinal StudiesFinlandWalesRespiration, ArtificialDisease Models, AnimalBronchoalveolar Lavage FluidSex DistributionRespiratory Distress Syndrome, AdultAcademic Medical CentersConfidence IntervalsSpainBrain-Computer InterfacesData CollectionPatient SatisfactionSmall-Area AnalysisPersonnel DownsizingCause of DeathPrimary Health CareNetherlandsAnalysis of VarianceHospitalizationEctogenesisLife Support CareHospitals, TeachingAttitude to HealthDecision MakingHousingInternship and ResidencyAdvance DirectivesIdiopathic Pulmonary FibrosisPhysician's Practice PatternsIncomePatient Acceptance of Health CareReproducibility of ResultsChronic DiseaseRisk AssessmentSpace-Time ClusteringPulmonary Disease, Chronic ObstructiveHospital MortalityPoverty AreasStatistics, NonparametricSepsisEmploymentRespiration DisordersOutpatient Clinics, HospitalReproductive Techniques, AssistedPregnancy OutcomeSensitivity and Specificity