National Longitudinal Study of Adolescent HealthLongitudinal StudiesHealth BehaviorSexual BehaviorAdolescent BehaviorAdolescent Health ServicesHealth StatusHealth SurveysAdolescent PsychologyRisk-TakingSexual Behavior, AnimalUnited StatesPublic HealthHealth PromotionDelivery of Health CareMental HealthSocioeconomic FactorsAttitude to HealthHealth Knowledge, Attitudes, PracticeQuestionnairesPeer GroupHealth PolicySex FactorsAdolescent MedicineSexual PartnersCross-Sectional StudiesCoitusHealth Care ReformSexually Transmitted DiseasesHealth EducationLogistic ModelsHealth Services AccessibilityAlcohol DrinkingPrevalenceFriendsBehavior, AnimalHealthInterpersonal RelationsAge FactorsSubstance-Related DisordersParent-Child RelationsHealth Care SurveysHealth Status DisparitiesRisk FactorsPrimary Health CareSmokingEducational StatusHealth Services Needs and DemandHealth PlanningHealth ServicesFeeding BehaviorSchoolsAfrican AmericansDepressionQuality of Health CareViolenceOral HealthInsurance, HealthHealth PersonnelCrime VictimsWorld HealthPatient Acceptance of Health CareResidence CharacteristicsObesityHealth Services ResearchSocial BehaviorSocial SupportJuvenile DelinquencyFamily CharacteristicsNational Health ProgramsEuropean Continental Ancestry GroupInterviews as TopicSelf ConceptAdolescent DevelopmentHealth ExpendituresRural HealthBody Mass IndexUrban HealthSocial EnvironmentOccupational HealthRegression AnalysisPublic Health AdministrationWomen's HealthMultivariate AnalysisHispanic AmericansEnvironmental HealthSocial ClassCondomsUnsafe SexMental Health ServicesSiblingsHealth Care RationingPublic Health PracticeHealth PrioritiesHIV InfectionsCommunity Health ServicesOdds RatioAttitude of Health PersonnelHealth LiteracyCopulation