National Longitudinal Study of Adolescent HealthLongitudinal StudiesAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyUnited StatesHealth StatusAdolescent MedicineHealth SurveysPeer GroupFriendsRisk-TakingHealth BehaviorSex FactorsSocioeconomic FactorsParent-Child RelationsCrime VictimsSexual BehaviorSchoolsRisk FactorsQuestionnairesLogistic ModelsCoitusAge FactorsInterpersonal RelationsPrevalenceViolenceAlcohol DrinkingAdolescent DevelopmentDepressionJuvenile DelinquencySubstance-Related DisordersSiblingsSelf ConceptObesityMental HealthPublic HealthEducational StatusFamily CharacteristicsHealth PromotionCross-Sectional StudiesEuropean Continental Ancestry GroupSexual PartnersSmokingBody Mass IndexAfrican AmericansSexually Transmitted DiseasesDelivery of Health CareAttitude to HealthResidence CharacteristicsHispanic AmericansRegression AnalysisMultivariate AnalysisSocial SupportHealth PolicyHealth Services AccessibilityHealth Knowledge, Attitudes, PracticeHealth EducationOdds RatioParentsHealth Status DisparitiesHealth Services Needs and DemandHealth Care ReformPregnancy in AdolescenceSocial EnvironmentHealth Care SurveysNational Health ProgramsHealthChild WelfareChild AbuseParentingProspective StudiesSchool Health ServicesCohort StudiesPrimary Health CareNational Institutes of Health (U.S.)Social ClassHealth PlanningInfant, NewbornQuality of Health CarePregnancyFollow-Up StudiesInterviews as TopicHealth ServicesWorld HealthReproductive Health ServicesInsurance, HealthHealth PersonnelHealth Services ResearchSexualityFamilyEthnic GroupsPatient Acceptance of Health CareHealth ExpendituresOral HealthPediatricsTime FactorsSuicide, AttemptedSelf ReportPublic Health Administration