National Longitudinal Study of Adolescent HealthLongitudinal StudiesSelf ConceptAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyBody ImageUnited StatesHealth SurveysAdolescent MedicineHealth StatusQuestionnairesPeer GroupFriendsRisk-TakingSex FactorsAdolescent DevelopmentHealth BehaviorParent-Child RelationsSocial SupportSocioeconomic FactorsSexual BehaviorSchoolsAge FactorsPrevalenceInterpersonal RelationsRisk FactorsCrime VictimsLogistic ModelsCoitusCross-Sectional StudiesAlcohol DrinkingHealth Care SurveysSubstance-Related DisordersViolenceDepressionObesityMental HealthEducational StatusSmokingFamily CharacteristicsHealth PromotionPublic HealthJuvenile DelinquencyAfrican AmericansBody Mass IndexAttitude to HealthSexually Transmitted DiseasesSiblingsEuropean Continental Ancestry GroupSexual PartnersResidence CharacteristicsDelivery of Health CareQuality of LifeHispanic AmericansHealth Knowledge, Attitudes, PracticeRegression AnalysisPregnancy in AdolescenceMultivariate AnalysisParentsHealth EducationHealth Services AccessibilityHealth PolicySocial EnvironmentHealth Services Needs and DemandOdds RatioParentingAdolescent PsychiatryHealth Status DisparitiesData CollectionSchool Health ServicesAdolescent Nutritional Physiological PhenomenaHealth Care ReformNational Health ProgramsHealthProspective StudiesPrimary Health CareSelf ReportSocial ClassChild WelfareCohort StudiesFamilyQuality of Health CarePregnancyNutrition SurveysFollow-Up StudiesReproductive Health ServicesNational Institutes of Health (U.S.)Interviews as TopicHealth PlanningEthnic GroupsPatient Acceptance of Health CareSuicide, AttemptedHealth ServicesSexualityInsurance, HealthHealth PersonnelTime FactorsSelf CareHealth Services Research