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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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isht sunoqeit easkm me anwt to aet na e icol oeikco adn pheo i ldbee otu

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caitlyncloy  ipck C adn vome no saw my tastrgey P: elph llo +2
thegooddoctor2  lol oodg eon +1
sparta  LOL ktahn uoy fro hsit mncmeto +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi no eno ointec hatt the ddOs tario no hte top tlef is nro?gw Am I nismgis g?hoesntmi If yuo cuaatlcle ,it 'tis 6 ustj keli teh top gtirh .e...no

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mjmejora  ahstt laclytua eylrla ufynn +
yex  euBcsea I said s,o plaisep .h.ree. -:/ +1
doodimoodi  Catn iveeleb we ypa 06$ for iths arcp +50
aisel1787  tbes comtenm odid)iomodo +1
b1ackcoffee  ttha ncigkfu htrew em off on x.mae I wsa ikle si eehtr na ecftfe dtcnafmioiio yb Nto" ndrnkigi lm.k"i teh fk!cu +2


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 +8  upvote downvote
submitted by sne(59)
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OR 1t;&g ndiceitas driceaens cunrceocer fo tenev. hTe ylon OR eragret nhta 1 was ni hte tbeal hatt itdadcein tath hte tubsecj tae kcoseio but nddt'i dknri ik.lm suhT, ttha is hte only neo ihwt a fictgsiinan rceconecur

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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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oFr pepoel how llegynare had eluobtr igraden eth wot :athsrc

riFts chr:ta We setarpade the nterie pantuopoil iton otw ersmall poptlsinauo to test fro eht skoioec etc.ffa In ipuaoPotnl A kndra( lk)mi heetr asw an ddso toira fo 6 y(pot ni the uatlac tc)a.hr In inaluotPop B ddi( otn inkrd kil)m rtehe asw an dsdo orati of .6 enicS het sddo istoar ear otn 1, we can uceldnco htta teh soickoe heav an ecfetf desgserrla fo eth poapnulito e(i dnkar ilkm poeple euvssr d'ndti drkni kmli )pe.leop

enoScd rt:hac ewN tes fo toalopisunp ot estt rfo eht ffteec of .mkli In tipnPuaolo C a(te eosiokc) heert was an dosd oitra of .1 In tpPonluioa D dd(i ton eta se)kicoo htree swa aols na osdd ratio of .1 iThs measn tath ikml did not ehva na eecftf rvee nda t'ddni iubeortnct to the isedeas.

Oyl"n oiekcso aer npdliendytene istdoacsae hwti .E clio "caess nesam htat nloy the coksoei esacu the ieasesd uiotwth eth sfteecf fo esnomihgt ee.ls

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 +7  upvote downvote
submitted by pg32(218)
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Teh cfta thta teh osdd taoir ni eth pot felt is iecorrnct easmk hits qtueions eryv iudift.clf tI mekas ti parpae as if the ecksooi are autsviace tbu teh limk hda moes erpittevco crfa.to oS oso.buionx

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drpatinoire  doG I hhotgtu olylatt hte aems wya sa ouy .idd I rtdesa ta ihts qsiuoent orf ta etals nm5i adn dseka emsfly wsh'ta grown itwh my c.tisasstti +1


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 +7  upvote downvote
submitted by youssefa(162)
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ayiiltIln ilkm rnidignk swa siaotscade iwht .coliE akutoebr iwth .9R3O= nda P.&;t00l10 .ti)n.(facinSi.g ertAf titifcontairas oitn aet kceoois dna ddi tno tea osceiko OR beamec 1 dnsaiet fo 3.9 innemag eht aiaosnsocit irpda.easpde roh,Tfeeer nigtea cosoeki asw a nfrcoenuod dna hrete is no aler sasinotaioc btnewee nirkgndi mkli dna t..iisedEaol.,n.c. ismlk' h(te oounfn)derc ootcuitninrb aws resnespblio orf eht RO of 9.3 ni eht rfsit pleca. Thsi was erhtreufd omdnetsartde wiht OR fo 6 ni hte eoskcoi oelna org.pu

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 +1  upvote downvote
submitted by sattanki(82)
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siTh neo reteh rwee oufr dosd rsot,ai noe odpirdev rnude eahc lat.be Teh nloy one ttah dah na sddo tiora eatgrer tnah 1.0 wsa eht taelb in eth pto grhit (ddOs toaRi = 6, I ie),vlbee whcih ewnh oyu ookedl ta eth ebasl,l eld ot eth htgri .aswern

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 +1  upvote downvote
submitted by famylife(110)
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n"A ddos iator of 1 tisidanec tath het idooincnt or envte nrued dsyut is alqyuel llikye to cruoc in tohb .rupgso nA dsdo oairt areertg hnat 1 dteacinis ttah the oonndiitc or vteen is reom yellki to rocuc in het irsft "uorp.g (hnriro.p/sa_asidkgetditii:kOw./tiwe//odp)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh RO in teh rpepu fetl 22 ablte is nicrroe,ct whihc luhods be 6 2(7*3626/ ,=6) otn 1. ishT namse teh RO of "aet "oskoice odes tno ancegh taerf ticoftantsiari yb ra"ndk mkli," so d"nrak lkmi" is ont a encurnofo,d dna a"et es"kiooc is ldeenetdpinyn osas /w ECEH oaeutbk.r

On the etohr ha,nd RO rof rakd"n k"lmi egadnch a olt m(rof 3.9 to ),10. cwihh nidcaiste k"ardn imlk" higmt be a udofcrneno ,nad terhf,ereo is ton ddnntenieyelp ssao w/ EEcH rt.ubeako

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 +0  upvote downvote
submitted by an_improved_me(91)
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A sieqtuno i roem genlraley ahev ..is.

Is it bsipeosl atth wneh oyu iarstfty the daat, (.e.i cpmoagirn het feeftc tath iaegnt ockesoi a,sh ni lepepo ohw rkdni ikml ro lpoepe woh od nto krind ilmk) taht hte odds iatro llwi ohws iceinfingacs ofr neo btu ont eth ethr?o

aSdi erfeyd,fltin in het xeapmle baoe,v lduco itgane cioskeo ni eppelo hwo idkrn ilmk laed to a saicnintifg srenacie teh rksi of ntnifio,ce tub nto ni polpee ohw hwo dt'dni kinrd i?mlk

'Iev lodkoe naruod ni shit tocmmne rhea,td dan veha nees oeppel tinomne eht mrte tcf"efe toai"nmoiidcf; is that awth my lepaxme vboea wduol h?wso

nI horte ,swrod fi ainteg cseokio + igknridn kmil elsda to a stiigancnif ris,k tbu eniagt ooickse + nto diirkngn klim sah on estscoaadi i,rsk lwuod taht eanm tath teh ilkm ash na fetef"c oodamctiiifn" no the skri fo gtiengt ieofnnict ni loeppe how tea ?sookiec

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 +0  upvote downvote
submitted by unknown001(9)
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hist si a snbuo e.qtiuons

enhw odds trioa is 1, aiemngn on sa,nciasotio

odsd ;>aroit 1, hwhci ni hist eqitsoun is 6, sname aasicitosno

werhe is dosd roita ? )a at eht tae -onikeioddoct nikrd kiml lcnmu.o enceh eth ,esnraw nlyo oicoke nnlptedyedine ssa. hitw e iloc

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew nca aekm htsgni smielp keli hits y: awif ew wnat to nwko ewrheth 1Xro, 2X eosrcetrla Y, we sjtu arstypleae etst 1X dan ,Y and 2X adn Y cgndloarcy.i W hne stte 1X hwti ,Y we rqeieur on X2 oprsu;xee nWe h etts X2 with Y, ew qrreuie no X1 xoee;spur

eW tste oeoick ihwt driaah,re hwne imlk saw not unkrd o(tp itr):gh ieitvosp e W sett ilkm iwth iarear,hd when on ikeooc asw netea wo(elr :htgr)i evegitna

lci:osoncun oynl ekicoo crertselao to teh erhirada

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 -5  upvote downvote
submitted by lilmonkey(63)
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Teh yrdweok is NTN.I"oPEDeiYs(Ea"DL)ENdacst Wichh ni mhuan lueangga aemsn OTN" AS.SC"ATODEI

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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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