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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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thsi untqoies aemsk me wnta to eat an e clio icokoe nda eoph i dblee uto

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caitlyncloy  kcip C dna oemv no was my steatgry :P eplh llo +2
thegooddoctor2  lol oogd neo +1
sparta  LOL tnakh ouy rof siht otmcmen +


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 +15  upvote downvote
submitted by doodimoodi(74)
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diD no oen oncite ttah teh dsOd aitro no eht opt ftle si go?rnw mA I issgmin otisegn?mh If yuo clatcelau t,i tis' 6 tsuj lkei eth otp tghri .eno...

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mjmejora  hatst clltayua ralyle fynun +
yex  cBueaes I aisd s,o islppea ...ehre -/: +1
doodimoodi  Ctan vibeele ew pay 06$ rfo itsh rcpa +50
aisel1787  steb necmtom omdioood)id +1
b1ackcoffee  hatt gnicukf hretw me off on me.xa I was eikl is rehet an ectfef dnfiatcooiim yb oNt" gdniinrk k"ml.i the fkuc! +2


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 +8  upvote downvote
submitted by sne(59)
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RO g&1t; tndseiiac ridcnasee enccrruoce of e.nvte eTh oynl RO trareeg atnh 1 saw in eth eabtl hatt tdaiceidn atht the tejsucb eat koceois tub tin'dd rikdn lmi.k husT, htta si hte lony eno wthi a isiantfcgni cencerruco

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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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For loepep how regneayll had rtulobe reagind the wto s:tarhc

tsrFi chr:at We dtrsaaeep eht rtenie anopultpoi tnoi wot lmrelas noutlpiasop ot tste fro hte ekcoios ftc.afe nI Pntuioploa A kr(dna klm)i htere asw an dods iarot fo 6 tpy(o ni the autalc .ahtrc) nI lupnootiPa B id(d otn inrdk )kmil ehert swa na osdd iaotr of 6. Scein teh sddo oartis are ton ,1 ew cna cocednlu htta het iseookc heav an efefct sedrraelsg of the nloatippou (ei krnda limk eplope seuvrs dtn'di dknir imlk .)lpoeep

Sceond archt: New ets of unotoppslai ot etts for hte teeffc fo mki.l In oplPiauton C a(te sok)eoci hetre wsa na ddos oarti fo 1. nI uoPpiolnta D d(id not eat )kcoioes hteer aws sloa an dsdo oarit fo .1 hsiT nsmae htat milk did ton veha na cetffe erve and tdind' nuttboicer to eht sdeisea.

"ynlO isckeoo are pieeyndneldtn dticsoaesa iwht E. icol csase" snema htta nloy het ickoeos sceau eht isesaed ihutowt teh esecftf of oitnghems ls.ee

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 +7  upvote downvote
submitted by pg32(218)
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ehT ftca tath the sddo itaor in teh top eflt is itcnrocer smake iths unqsiote yvre ucftdliif. It smeka it eppraa as if teh sicoeko are sicaautve tbu eth ilkm dha eosm tteporvcei fcta.or oS bo.ooisxnu

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drpatinoire  dGo I huhtgot ltltyao eht asme ywa sa uyo .ddi I ratdse ta isth uniqtose rof at elsat n5mi nad eakds ylmefs 'whats gowrn htwi ym isss.aicttt +1


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 +7  upvote downvote
submitted by youssefa(162)
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lniaIytli ilmk gniinrkd wsa tiscdasoea with liE.co bkrouate whti =9O.R3 dna 01&0tl.;0P niSignc.(tif..a) tArfe ioicntttsraiaf otin ate okoscei and idd ont aet koscioe OR ecambe 1 aesitnd fo 3.9 neimgna the oonaassiitc pdie.rapdsae ereefor,Th gniaet skiceoo aws a cuonronfed and hrete is no real tcisooasian bneteew niidngkr limk dna .d.nElt.ic.a,ise.o lsi'km ht(e )dufeoncrno btoiunrtiocn wsa rbisolesnpe ofr the OR fo .39 in teh itrfs el.apc Thsi aws ehudtrfer denedrsmtaot wthi OR of 6 in the socioek aleon .upgor

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 +1  upvote downvote
submitted by sattanki(82)
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shTi one etreh ewer foru dods riasot, eon rvdeodpi endur chea btl.ea eTh lyon eon tath had an sddo traoi rrateeg nhta .10 saw the talbe in eth otp hgrti (dOds atRoi = 6, I ve)eilb,e ihhcw hwen you looekd ta hte ls,lbae del ot het igtrh a.snwre

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 +1  upvote downvote
submitted by famylife(110)
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An" ddos rtaoi of 1 icatdsein hatt hte dciootinn or vente rendu dstyu si qluayle yllike to crocu ni tobh grpuos. nA odsd toira gratere tnha 1 iaectsidn hatt eth dinotncio or veetn is mero kiylle to ourcc ni eth fsitr rg.puo" (kteai:iropoisdiretOin/g_d/awsh..t/pik/dw)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe OR in teh erupp lfet 22 aelbt is oticrr,nec wihhc ohlsdu be 6 27(632*6/ =,6) otn 1. sThi nasme the OR fo e"at i"ooskce deos ont ngcaeh atrfe aiitscrnotafit by rk"and kmi"l, so dran"k likm" is otn a noedf,ruocn nda ta"e csei"koo is teldinpyenend saso /w HCEE uba.rotek

nO teh orhte a,dnh OR rof r"dnak "imlk ngadhec a otl fmro( .39 ot 0.)1, wihch tedisnica "rnkad kl"mi htimg be a uonrnodfce ,dan fert,eerho is otn ypdntleinened asso w/ HcEE aub.rketo

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 +0  upvote downvote
submitted by an_improved_me(91)
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A ouiensqt i mroe lgyenerla vhae i..s.

Is ti selipbso atht enwh yuo asytftri hte t,ada ie(.. narciopmg hte teceff ttah ngetai oioeksc ,ash ni oplepe ohw inkrd lkim ro epolep ohw od ton rinkd mki)l hatt eht sodd rioat llwi oshw aiiinfcgecsn rfo eon tbu tno eht ?rhote

diaS terdyleif,nf ni the lmpeeax oe,vba udcol inagte keioosc in pelepo ohw dinrk likm ldea to a gaifinntcis renaiecs teh rkis of f,iociennt tub tno in epolpe who owh 'tindd dirkn mli?k

Iev' eoolkd rnduao ni iths cmnoemt ta,ehrd dan avhe esne peelpo enonmti het emrt tec"ffe ;oi"cdanitmofi si hatt htwa ym mepelxa eabov wluod h?wos

In toher wrods, if iegatn oesoick + nikngrdi mlki easld ot a cafiningist rki,s ubt gtniea soicoke + otn ingikndr klmi hsa no tsiasdeoca ,irsk dwlou ttah nmea atth the milk has an t"cfeef nmcf"iadtoioi on eht srik fo etgigtn ntciioenf ni loppee woh eta iseoc?ok

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 +0  upvote downvote
submitted by unknown001(9)
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hist si a nosbu tunieqo.s

newh odsd aoitr is 1, nemangi no ioosaitacn,s

odsd t&agr;ito 1, hihwc ni isth oqiusnte is ,6 maens cosnoiistaa

herew is osdd oitra ? a) at het tea c-edokitodnio riknd ilkm c.oumnl ecneh hte narsw,e yoln okeico etnilednydnep a.ss iwth e clio

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew cna akem nsgiht pmelis klei isht :yifwa we antw ot okwn rheehwt 1,roX 2X soerlretac Y, ew tjus asaryetelp etts 1X and ,Y dna 2X and Y ylid.gcrncao enh W etts 1X thiw Y, we rreeiqu on X2 expsor;eu hWen stte X2 ihtw Y, ew urreeiq on 1X ro;peuesx

eW stte eciook ihwt ieraah,rd ewhn mlki swa tno rknud pto( ir):thg otivpsei e W sett mlki htwi aid,aerhr wneh no ooikce asw etnae orew(l hg)it:r iengavte

:sinlcunoco onyl koieoc eolcasrtre to hte darreiah

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh roykwde is aitY(TEDEaLPsEeo.cNdsDI")N"N hhicW in nmuah guneagal emnsa "TNO STOC.EIDA"AS

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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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