NR 503 Midterm Exam week 4 With complete solution Newest

I!l NR 503 Midterm Exam
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(Complete solutions and resources for the course exam)
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Questions1 I!l




Whichsofsthesfollowingsstatementssbestsdescribesefficacy? I!l

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•
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ItsissansestimatesofsthesbenefitsofstreatmentsundersidealsconditionsIts s i
• ssansestimatesofsthesreductionsofsdiseasesinstreatedsgroups
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Questions2 I!l




Asstudysissconductedsforsaspharmaceuticalsagentsthatshassshownspromisesforsreducingsheartsdiseaseamons
gswomen.sInsorderstosmoresfullysteststhesagent,sansadditionalsstudysissdonesrestrictingsthesparticipantsstosb
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esr&omizedstosthoseswhoshavesashistorysofshypertension.sWhichsofsthesfollowingsadvantagesscannotsbesclai
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medsbysthesresearchers?
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• Thesgeneralizabilitysofsthesstudysissincreased I!l

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Questions3 I!l




Whatsissthesmainsadvantagesofsthesr&omizationsofsthes168sstudysparticipantsstosonesofsthestwosdrugtreatments sgro ups? I!l I!l


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• Reducessthespotentialsforsselectionsbiassinsallocationsofstreatmentsgroup I!l

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Questions4 I!l




Aftersentrysintosthesstudy,spatientssweresfirstsclassifiedsintosthreesgroups,sthoseswhoshadsasprevioussAMI,st
hoseswithsasfirstsAMIswhosweresatshighsrisksforsotherscardiovascularsdiseasesssuchsasscongestivehearts sfailu
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re,s&sthoseswithsasfirstsAMIswhosweresatslowsrisksforsotherscardiovascularsdiseases.sWhichstermsbestsdescrib
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essthesstudysdesign?
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• R&omizedsclinicalstrialswithsstratifiedsr&omization I!l

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Questions5 I!l




Aftersassignmentstostreatmentsgroup,s77%sofsthosesinsthesplacebosgroupsweresmen,swhiles80%softhoses sins
thesdrugsXsgroupsweresmen.sWhichsstatementsissmostslikelystosbestrue?
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R&omizationswasssuccessfulssincesthesinvestigatorssdidsnotsaltersthesselectionsofsparticipantssineits
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I!l hersgroupsinsorderstosensuresequalspercentagessofsmen I!l




Questions6 I!l




Aspreliminarysanalysisswassconductedsafters6smonthss&sfoundsthats87%sofsparticipantssinsthesplacebogrous
ps&s85%sofsthosesinsthesdrugsXsgroupshadstakensmoresthans90%sofstheirsprescribedsdosages.
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Whichsstatementsbestsdescribessthissfinding?
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Thescharacteristicssofspatientsswhosfailedstoscomplyswithsthestreatmentsdosagessshouldsbeasss
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I!l essedsasstheysmaysdiffersfromsthoseswhoscomplied I!l




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Questions7 I!l


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Whichsofsthesfollowingsstatementssbestsdescribessthesreasonsforsconductingsthesstudysassasdoubleblinds
strial? I!l

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I!l Doublesblindingsensuressthatspotentialsbiasessregardingsselection,sfollowup,s&sanalysisscansbereduceds I!l




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Questions8 I!l




Asmulticentersdoubleblindsr&omizedsstudyswasscarriedsoutstoscomparestheseffectsofsdrugsXswithsthatsofsasplacebosinspatient
ur vivingsacutesmyocardialsinfarctions(AMI).sTreatmentswithsthesdrugsstarteds7sdayssaftersinfarctionsins1,884sp
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atients,s52%sofsallspersonsswhosweresevaluatedsforsentrysintosthesstudy.945s sparticipantssweresr&omizedstos
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treatmentswithsdrugsXswhiles939sweresassignedstosthesplacebosgroup.sPatientssweresthensfollowedsfors12sm
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onthssforsreinfarction.sTheresweres152sdeathssinsthesplacebosgroups&s98sinsthesgroupsreceivingsdrugsX.
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ThesresearcherssconcludesthatstreatmentswithsdrugsXsreducessmortalitysinspatientsswhoshaveshadsanAMI.s s

Thesresearcherssare:
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• CorrectsbecausesthesratesofsdeathsissdecreasedsinsthesdrugsXsgroup I!l

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Questions9 I!l




Thesfollowingsdatascomesfromsasstudysofsapproachesstossmokingscessation.sSmokersswhoswantstosquitwers
esr&omizedstosonesofsfoursgroups:scontrolsgroupsCswhosreceivedsnosinterventionsassistance,squittingsguides
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groupsQswhosreceivedsbrochuressaboutshowstosquitssmoking,squittingsguides&ssupportsgroupsQSswhosreceiv
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edsquittingsbrochuressasswellsasssocialssupportsbrochuresslistingsbenefitssofssmokingscessation,s&stelephon
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essupportsgroupsTswhosreceivedsthesbrochuress&sasmonthlysphonescallsfromsascounselor.sParticipantssrece
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ivedsmailedssurveyssats8,s16,s&s24smonthssaftersr&omization.sThesresultssafters2syearssaresinsthestablesbelo
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w.sWhichsgroupshadsthesleastssuccesssinstermssofsquittingssmoking?
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• GroupsQS I!l

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Questions10 I!l




Thesfollowingsdatascomesfromsasstudysofsapproachesstossmokingscessation.sSmokersswhoswantstosquitwers
I!l esr&omizedstosonesofsfoursgroups:scontrolsgroupsCswhosreceivedsnosinterventionsassistance,squittingsguides
I!l groupsQswhosreceivedsbrochuressaboutshowstosquitssmoking,squittingsguides&ssupportsgroupsQSswhosreceiv
I!l edsquittingsbrochuressasswellsasssocialssupportsbrochuresslistingsbenefitssofssmokingscessation,s&stelephon
I!l essupportsgroupsTswhosreceivedsthesbrochuress&sasmonthlysphonescallsfromsascounselor.sParticipantssrece
I!l ivedsmailedssurveyssats8,s16,s&s24smonthssaftersr&omization.sThesresultssafters2syearssaresinsthestablesbelo
I!l w.sWhatsissthesmainspurposesofsr&omizationsinsthissstudy? I!l I!l




• Tosavoidsassigningsmorespersonsswhoshavestrieds&sfailedstosquitsinsthespaststosthescontrolsgroup I!l

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Useful Links for Detail Solution:
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Useful Links: s I!l




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udent Consult Questions and Answers, NR 503: Population Hea
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