National Longitudinal Study of Adolescent HealthLongitudinal StudiesAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyUnited StatesHealth StatusAdolescent MedicineHealth SurveysPeer GroupFriendsRisk-TakingSex FactorsHealth BehaviorSocioeconomic FactorsParent-Child RelationsSexual BehaviorCrime VictimsAge FactorsSchoolsInterpersonal RelationsQuestionnairesCoitusRisk FactorsLogistic ModelsAlcohol DrinkingAdolescent DevelopmentViolencePrevalenceSubstance-Related DisordersDepressionJuvenile DelinquencySelf ConceptEducational StatusCross-Sectional StudiesMental HealthPublic HealthObesitySiblingsFamily CharacteristicsSexual PartnersSmokingHealth PromotionEuropean Continental Ancestry GroupBody Mass IndexSexually Transmitted DiseasesAfrican AmericansDelivery of Health CareResidence CharacteristicsAttitude to HealthRegression AnalysisHispanic AmericansMultivariate AnalysisSocial SupportHealth PolicyHealth Services AccessibilityHealth Knowledge, Attitudes, PracticeHealth EducationHealth Status DisparitiesOdds RatioHealth Services Needs and DemandHealth Care ReformSocial EnvironmentPregnancy in AdolescenceHealth Care SurveysHealthParentsNational Health ProgramsProspective StudiesParentingPregnancyPrimary Health CareSocial ClassNational Institutes of Health (U.S.)Cohort StudiesSchool Health ServicesChild WelfareHealth PlanningQuality of Health CareTime FactorsInterviews as TopicInsurance, HealthReproductive Health ServicesHealth ServicesFollow-Up StudiesAgingWorld HealthHealth PersonnelSexualityHealth Services ResearchChild AbuseFamilyEthnic GroupsHealth ExpendituresOral HealthPatient Acceptance of Health CareCourtshipInfant, NewbornSelf ReportSuicide, Attempted