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National Longitudinal Study of Adolescent HealthLongitudinal StudiesAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyUnited StatesHealth StatusAdolescent MedicineHealth SurveysPeer GroupFriendsRisk-TakingSex FactorsHealth BehaviorSocioeconomic FactorsRisk FactorsAge FactorsParent-Child RelationsLogistic ModelsSexual BehaviorCrime VictimsQuestionnairesSchoolsInterpersonal RelationsCoitusAlcohol DrinkingPrevalenceAdolescent DevelopmentViolenceDepressionSubstance-Related DisordersJuvenile DelinquencySelf ConceptEducational StatusMental HealthObesityPublic HealthSiblingsCross-Sectional StudiesFamily CharacteristicsSmokingEuropean Continental Ancestry GroupBody Mass IndexSexual PartnersHealth PromotionAfrican AmericansMultivariate AnalysisRegression AnalysisSexually Transmitted DiseasesResidence CharacteristicsDelivery of Health CareAttitude to HealthHispanic AmericansSocial SupportHealth PolicyOdds RatioProspective StudiesHealth Knowledge, Attitudes, PracticeHealth Services AccessibilityHealth Status DisparitiesHealth EducationHealth Services Needs and DemandSocial EnvironmentCohort StudiesHealth Care ReformPregnancy in AdolescenceFollow-Up StudiesParentsHealth Care SurveysHealthTime FactorsNational Health ProgramsPregnancyParentingPrimary Health CareSocial ClassNational Institutes of Health (U.S.)School Health ServicesChild WelfareHealth PlanningQuality of Health CareInterviews as TopicAgingInsurance, HealthHealth ServicesPredictive Value of TestsReproductive Health ServicesWorld HealthHealth PersonnelHealth Services ResearchSexualityEthnic GroupsFamilyChild AbusePatient Acceptance of Health CareInfant, NewbornSelf ReportHealth ExpendituresTreatment OutcomeSuicide, Attempted