PovertySocioeconomic FactorsChild WelfareDisabled ChildrenChild BehaviorChild Health ServicesChild RearingChild, InstitutionalizedChild Behavior DisordersChild PsychologyChild of Impaired ParentsDental Care for ChildrenChild, OrphanedParentsChild Nutrition DisordersChild LanguageChild Nutritional Physiological PhenomenaChild MortalityAge FactorsMothersRisk FactorsCross-Sectional StudiesPrevalenceParent-Child RelationsQuestionnairesRetrospective StudiesTreatment OutcomeFollow-Up StudiesProspective StudiesInfant, NewbornUnited StatesTime FactorsChild CustodyBody HeightChild Development Disorders, PervasiveLongitudinal StudiesPediatricsAsthmaSchoolsPregnancyMother-Child RelationsPlay and PlaythingsChild, AbandonedHospitals, PediatricGrowth DisordersCase-Control StudiesRural PopulationSeverity of Illness Index