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Retired NBME 24 Answers

nbme24/Block 4/Question#30 (reveal difficulty score)
An investigator is studying an outbreak of ...
Only cookies are independently associated with E. coli cases 🔍 / 📺 / 🌳 / 📖
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 +67  upvote downvote
submitted by niboonsh(409)
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iths qoiuestn emska me atwn to aet an e ciol kcooie nda ehop i deleb out

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caitlyncloy  ipkc C adn vmoe on saw ym trgtayse :P phel oll +2
thegooddoctor2  llo godo neo +1
sparta  LOL anhkt oyu orf hsit ntmcemo +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Did on eon eicton ahtt the sddO oitra on the otp etlf si o?wgrn mA I inssimg ito?shnmge fI uyo luaalctec t,i 'sti 6 jstu ekil eht top rhtgi .ne...o

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mjmejora  hstta yaclulta llyear fnynu +
yex  eaBesuc I isda ,os slaipep ee.hr.. :-/ +1
doodimoodi  tanC veilbee ew pya 0$6 ofr this crpa +50
aisel1787  ebst nmectom d)mdioooido +1
b1ackcoffee  htat nukicgf wtrhe em off no xe.am I wsa keli is eehrt an feecft iocnofiatimd yb toN" ngriindk l"mik. eht kf!uc +2


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 +8  upvote downvote
submitted by sne(59)
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OR t1g&; tisiadenc nsarceide ecrrocunce fo v.ntee Teh oyln RO egaertr ahtn 1 asw ni teh aeblt thta aeicidndt atth het jcbuets tae iooksce but int'dd krnid .limk sT,hu tath si eth lony one htiw a tncisiangif crecnucoer

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For a more systematic approach. First look at cookies p-val is sig when not stratified, the top table is stratified the OR > 1 => sig => cookies have association.

Then look at milk p-val is sig when not stratified, the bottom table stratified the OR = 1 => loss of significance => milk have no association.

+1/- peqmd(75)

Uworld ID 1173 has a good explanation for how to look at stratified analysis.

+/- peqmd(75)

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 +8  upvote downvote
submitted by qiss(20)
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roF eoplep owh lalngyree adh rlotube dangire het otw chr:ats

tFisr arc:ht eW aedpetras hte rtneie ptapuilono toni wto leraslm utnloioaspp ot stte ofr eth ecoiosk e.tcfaf In npPutialoo A dk(nra kl)im tehre wsa an dsdo toira of 6 y(opt ni eth catual ah.tr)c In lPpaniuoto B d(di ont idnkr lmi)k there wsa an sodd rtoai fo .6 nceiS eht ddso saitor rae tno 1, ew anc elduoncc thta the iokseco hvea an ftfeec egrsdalers fo eth opuapitnlo ie( narkd kiml elppeo rsuevs 'dtndi irdkn imkl e.elpp)o

dnSoec rca:ht New set of poaoutnipsl to stte ofr eth teeffc fo l.ikm nI Pontilpuao C eta( )eoksioc erteh swa an odds rtioa fo .1 nI aoPliptuon D (idd ton tae koe)scio eerth asw lsao an sddo orait of .1 hisT nasem that iklm ddi tno eahv na ceffte rvee dna ddt'ni riotbctune ot eth .edasise

ynl"O ioksoec aer nnetpdineyled sdosataeci whti .E lcoi "csase msane ahtt noyl het ooickes eausc eth aseeids witouht hte efesfct of ehomgntis eles.

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 +7  upvote downvote
submitted by pg32(218)
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hTe fcat atth hte dsdo iatro in eht pto flte si roicctrne akesm tsih ioqsteun yrve tuilffcid. tI samek ti aparpe as fi het kocoies are autviecsa tbu eth klmi adh omse tioeecrtvp rtoac.f So uobsnooi.x

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drpatinoire  Gdo I gouhhtt atoltyl hte aesm awy sa yuo d.di I erdats ta ihts qetunios for ta lsaet i5mn nda asdek feslmy ah'wst ngorw whit ym ta.sstsicti +1


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 +7  upvote downvote
submitted by youssefa(162)
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yIianitll kilm idinkrng saw taasoeiscd thiw oicE.l kaeurtbo whti RO3.=9 nda ;.00tP0&l1 n.)(ciit.Sginaf. tAfer atisaotcrintif onti tea ocskoie and idd not tae oekscoi OR caemeb 1 aseidtn fo 9.3 mgianen eht cnsiatoisao dedra.isappe eroef,rehT ntegia kecsioo saw a noudorfecn nda eetrh si on earl otsnocsaiia wtnebee ninigdkr limk nda .a,s.tdi.Ecn.el.io l'mksi te(h ourcefndon) uonitocnibtr swa slnseiroebp for teh OR of .93 in eth rtifs lpc.ae shiT wsa tuererhfd endrtsedmoat twhi OR of 6 in teh sekioco naleo ogr.up

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 +1  upvote downvote
submitted by sattanki(82)
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ihTs noe treeh erwe foru odds atsor,i one doridpev dunre aech eblt.a ehT lony oen htat ahd na ddos aotri etrgera tahn .01 aws het belat ni teh top thgri (Odds tRiao = 6, I lieveb,e) hicwh ewhn uyo keldoo at eth lbsl,ea del to eht trghi es.nrwa

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 +1  upvote downvote
submitted by famylife(110)
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"An dosd iorat fo 1 aitiednsc taht eth cntoniodi or netev udner tudsy si yleqalu ylklei ot uocrc in hbto so.purg nA odds tiroa trgaeer ahnt 1 dcasiinte taht the nindcitoo or neevt si meor kelyil ot urcoc in the isftr o.pg"ru (iro//ir:.ht.dsoiOwkpnideg_taatepi/wsid/k)

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 +1  upvote downvote
submitted by xw1984(8)
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eTh RO in eht pperu ltef 22 telab si rcrcei,not hciwh osuhld eb 6 7(23/6*26 =),6 nto 1. isTh msnea het RO of aet" ocio"kes seod not gcnahe treaf tatiiifotsnrca yb dk"rna ,iklm" so dr"ank imk"l si not a ufe,cronndo dna eta" csokio"e is ndeldntiepney asso /w HECE erbtouka.

On het ohtre ha,nd RO rof kna"dr imlk" gcnedha a olt o(rmf 3.9 to ,0.)1 hcwih aensidtic a"rdnk mi"lk mhgit eb a oecrndfoun d,an hoereftr,e is tno nlideendpteyn asos w/ HEcE .oburakte

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 +0  upvote downvote
submitted by an_improved_me(91)
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A oiqtneus i mero rleyngela eahv ..si.

Is it lpsiesob tath when uoy iafystrt the taad, ie.(. rgpcmonia hte tfefec tath itaeng kiescoo ,ahs ni epoelp woh krdni lkim or poeepl how od nto iknrd lki)m htta eht osdd iorat wlli ohsw iigiaencscnf rof neo ubt tno hte ?rhote

aSid ,enlyfrtfedi in eth lmxeepa ob,aev dculo neitga eskocio ni poepel hwo inrdk lkmi aedl ot a inficitgnsa reiescan eht skri of co,tifinen tbu not ni lepoep ohw owh td'ind irdkn km?li

Iv'e dkoeol onuard in ihst emmonct r,adteh nad eahv eesn elpeop mnnitoe eht mrte e"cffet "d;nicatofmioi si tath twah my expalem avebo wdluo hosw?

In hreto w,rosd if tganei icokose + inikdgnr mlik slaed ot a nfcnitisiga ,rksi btu entiag oiskoce + not ndirignk lmik sha no eiaaosctds ki,sr ldwuo ahtt mean htta teh lkim ahs na ff"eect nitooafdmi"ci no teh srik fo etggitn foincient ni plopee hwo aet oock?ies

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 +0  upvote downvote
submitted by unknown001(9)
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isth is a snubo netsquoi.

ewhn dods aitro si ,1 nnaiegm no toasiscoain,

ddos r;tagio&t 1, iwhhc in itsh qtnusoie is 6, smnea stcoaaniiso

rwehe is osdd arito ? a) ta het eta notddioe-oick krnid lmik .cuolnm hecen het ,reawsn ylno iookec ieyntdpdenenl s.as wiht e ilco

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew anc kmae tshngi mseilp klie tish fyaiw : we nwat ot nwok ehrweth oXr1, 2X otcarelsre Y, ew utsj aastrlepye ttes 1X nad Y, nad 2X dan Y idaoclg.ycnr When stet 1X iwth ,Y we equreir no X2 ue;eprxos ne hW etst 2X thiw ,Y we ueriqer on 1X pxsuoere;

eW tset oeicok itwh edaai,hrr nhew mlki asw tno udnrk otp( rh)git: estivoip e W estt kilm htwi ed,rhiaar henw no ckeioo saw etean erow(l h:tri)g neiagtev

occiun:nols ynol koceio lrersaceto to het heridraa

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh owrdyke is NIacNiYTPtLsE)EeNEaDd("D.s"o hciWh in naumh angeugal snema "NTO AIDSST.COA"E

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I agree it's a poor choice of words but what they mean by "independently" associated is that which of the variable is the only one associated with dz without any confounding.

+1/- peqmd(75)

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