《杜甫全集》PPT课件

PregnancyExperience293:5462.,StudyHypotheses,YoungwomenwhohaveexperiencedpregnancyaremorelikelytouseEC,thanyoungwomenwhohavenotexperiencedpregnancy.2)Amongyoungwomenwhohaveexperiencedpregnancy,thosewhohaveexperiencedabortionaremorelikelytouseEC,thanyoungwomenwhohavenotexperiencedabortion,whomayormaynothaveexperiencedpregnancy.,Measures,OutcomeMeasure(Follow-upvisit):oECuseMainPredictorMeasures(Baselinevisit):oPreviouspregnancy(yes/no)oPreviousabortion(yes/no-includesthosewhohavebeenpregnant,butnothadanabortionandthosewhohavenotbeenpregnant),Measurescontinued,PredictorMeasures:oLevelofaccesstoEC(studyarm)oClinicsite(enrollmentsite)oAge(continuous)oRace/EthnicityoEverusedEC(yes/no)oFrequencyofintercourseoUnprotectedintercoursepast6mos(yes/no)oContraceptivemethodoPregnancyAttitude(veryunhappy/other),Methods,Chi-squaretests:Differencesbetweenpreviouspregnancy/abortionandnopreviouspregnancy/abortiongroups.Crudeoddsratios:Associationbetweenpreviouspregnancy/abortionandcharacteristicsofparticipantsatenrollment(demographics,contraceptive/sexualbehaviorsandpregnancyattitudes).Multivariatelogisticregression:Impactofpreviouspregnancy/abortion(andotherpredictors)onECuseduringthestudy(adjusted).,PreviouspregnancyN=686(32.4%)UsedECduringstudy(outcome)N=200(35.0%)Chi-squaretestsshowedsignificantdifferencesbetweenpregnancyexperiencegroupsineverycharacteristicexaminedexceptforlevelofaccesstoEC(studyarm),Results:PreviousPregnancy,MultivariateLogisticRegression:PreviousPregnancy,32%higheroddsofECuseamongparticipantswhohadhadapreviouspregnancycomparedtothosewhohadnot,adjustingforalltheothervariables,OddsofECuse:UnprotectedintercourseEverusedECOCuseanduseofbothOCandcondoms*Adjustedforalltheothervariables,MultivariateLogisticRegression:PreviousPregnancy,Ofthe686(32.4%)participantswhoreportedpregnancyatbaseline,562(81.9%)reportedthattheyhadhadanabortion.UsedECduringstudyN=167(29.2%)Chi-squaretestsshowedsignificantdifferencesbetweenabortionexperiencegroupsineverycharacteristicexaminedexceptforlevelofaccesstoEC(studyarm)andclinicsite.,Results:PreviousAbortion,MultivariateLogisticRegression:PreviousAbortion,41%higheroddsofECuseamongparticipantswhohadhadapreviousabortioncomparedtothosewhohadnot,adjustingforalltheothervariables,OddsofECuse:UnprotectedintercourseEverusedECOCuseanduseofbothOCandcondoms*Adjustedforalltheothervariables,MultivariateLogisticRegression:PreviousAbortion,Limitations,RiskperceptionwasnotdirectlymeasuredinthestudySelf-reportedpregnancyandabortion;likelyunder-reported,leadingtounder-estimatesofECuseDatawerenotcollectedtotestmyhypotheses,Conclusions,IncreasedratesofunprotectedintercourseandincreasedECuseamongyoungwomenwithpreviouspregnanciesandabortions(maycanceleachotherout)AreductioninunintendedpregnanciesmaynotbeobservedinthesesubgroupsofyoungwomenEducationaboutcontraceptiveriskinthesesubgroupsisindicated,ThankYou!,ThesisCommitteeMembers:Drs.JaneRees(Chair),CynthiaHarper&HendrikaMeischkeNateMercaldoandtheDept.ofBiostatisticsconsultantsFamilyandFriends(especiallythe“FridayThesisGroup”members)Adam,Thisworkwassupportedinpartbyagrantfr