National Longitudinal Study of Adolescent HealthLongitudinal StudiesAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyUnited StatesAdolescent MedicineHealth StatusPeer GroupHealth SurveysFriendsRisk-TakingParent-Child RelationsAdolescent DevelopmentSex FactorsHealth BehaviorSocioeconomic FactorsQuestionnairesSchoolsAge FactorsSexual BehaviorInterpersonal RelationsRisk FactorsCrime VictimsPrevalenceLogistic ModelsCoitusSubstance-Related DisordersAlcohol DrinkingViolenceCross-Sectional StudiesDepressionSelf ConceptObesityMental HealthChild WelfareFamily CharacteristicsBody Mass IndexSmokingSiblingsEducational StatusPublic HealthJuvenile DelinquencyAfrican AmericansHealth PromotionEuropean Continental Ancestry GroupParentsSexually Transmitted DiseasesSexual PartnersAttitude to HealthResidence CharacteristicsDelivery of Health CareRegression AnalysisPregnancy in AdolescenceHispanic AmericansSocial SupportMultivariate AnalysisHealth Knowledge, Attitudes, PracticeHealth EducationSocial EnvironmentHealth PolicyHealth Services AccessibilityChild BehaviorHealth Services Needs and DemandOdds RatioParentingSchool Health ServicesHealth Status DisparitiesAdolescent PsychiatryProspective StudiesAdolescent Nutritional Physiological PhenomenaHealth Care SurveysHealth Care ReformChild Health ServicesHealthNational Health ProgramsFamilyFollow-Up StudiesPregnancyDisabled ChildrenSocial ClassPrimary Health CareInterviews as TopicPediatricsNational Institutes of Health (U.S.)Child of Impaired ParentsReproductive Health ServicesHealth PlanningQuality of Health CareTime FactorsEthnic GroupsCohort StudiesMothersInsurance, HealthSelf ReportSexualitySuicide, AttemptedHealth ServicesUrban PopulationPatient Acceptance of Health Care