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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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stih stnoquei skema me watn to eat an e clio okeoic nda hepo i elbde uto

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caitlyncloy  pkci C dan omev on saw my arsytegt :P leph llo +2
thegooddoctor2  lol odog noe +1
sparta  OLL hnatk uyo orf hsti nemmcto +



 +15  upvote downvote
submitted by doodimoodi(74)
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idD on eon neitoc ttah hte dOds oatir on eth pto tlef is onwg?r Am I gmissni tsoi?hgemn fI yuo cutllacea ,it st'i 6 tujs iekl teh top tghir .n...oe

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mjmejora  thsat auyltacl yelalr unnyf +
yex  suaeBce I dsai so, psliape .rhee.. /:- +1
doodimoodi  nCat beeevil we pay $06 ofr isht carp +50
aisel1787  btse toemncm mdiooiodod) +1
b1ackcoffee  thta fnuicgk hretw em fof no .xame I wsa klie si terhe na efeftc maiotcfnoidi by oNt" dkgiinnr i"l.mk eth fk!uc +2



 +8  upvote downvote
submitted by sne(59)
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OR t1;&g ndsicaite ieardscne ercucorecn of n.vtee hTe noyl OR reegtar tanh 1 was ni het btale atth iidcetand thta teh cbtusej ate oceosik btu 'intdd rnkdi m.lik ,Tshu atht si teh ynol oen thiw a incntfiisga cerccnreuo

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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)


 +8  upvote downvote
submitted by qiss(20)
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Fro oepepl ohw yglnleera hda otrlebu ignadre het owt ahr:cst

isFrt chra:t eW astapdeer het tnreei olpinatoup noti owt lamlsre nuslaptooip to tset orf teh keisooc .tfeafc nI tpPlnouaoi A k(ndar m)lik ehtre wsa an osdd toiar fo 6 (pyto in the aacult h.ar)tc In opuaPonitl B did( tno dnirk ml)ki tereh was na odsd taori of .6 inSec het dods atrsoi era tno ,1 we acn oecnculd hatt eth sicoeko veha an efefct ledraressg of eth pilauponot i(e anrdk ilkm lpopee vssuer didnt' rdnik ilmk pelp)e.o

cndoSe arhc:t wNe tes fo oosniptupla ot etts rfo the efftec fo .lkmi nI poonatPiul C (tae scoioke) ehter was an ddos iorat of 1. nI noiatulopP D d(id tno tae koioesc) rethe aws sloa na sdod aotir of .1 Tihs nsame ttah lkim idd ton aveh an ffctee ever adn dt'din uicernttob ot eth easdies.

Ol"ny oeskioc aer nitpdlndeyeen astaieodsc itwh E. cloi es"csa senam htat yoln teh kciseoo eacus het dssaeei otiwuht eth tcffees fo emiosgtnh .seel

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 +7  upvote downvote
submitted by pg32(218)
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Teh tfca atht het dsdo oriat in het pot elft is oertnricc eksma ihst seqitoun yrev .iufdltifc It meaks it areapp sa fi hte ckoosei are aicavuets but het milk ahd esmo vcerotitep tfr.oca So oiunxs.obo

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drpatinoire  Gdo I thuhogt tllyota het saem awy as oyu did. I tradse at hist ntiousqe fro at atsle 5imn nda sedka lyefsm w'shat rwngo wiht my ci.astitsst +1



 +7  upvote downvote
submitted by youssefa(162)
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ailytiIln milk iigdnknr swa casatiseod twhi E.ocli etukrbao thiw =RO.39 nad ;l0t.&1P00 Sii).f.g(ntan.ci tefAr ncaiftaoiitsrt toni tae ooicsek and ddi ont ate skoeico OR meecba 1 desntai fo 3.9 geannim teh tcnossiioaa epaps.aieddr or,ehrfeeT nategi ocekiso wsa a duenconorf adn eerht is on lera nosaoaistci eetewbn kriigndn iklm adn Eetl....oi.nids,ac skl'mi he(t don)uerfocn tocuinnortib wsa enosrselbpi ofr the RO of .39 in eht tsirf pael.c This wsa drethrefu emoddtnrseat twhi RO fo 6 ni the ieoocsk laeon .ruopg

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 +1  upvote downvote
submitted by sattanki(82)
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iThs eno rhete wree urof dsdo trsai,o one ddeovpri dreun echa elabt. eTh lyno eon ahtt dha na dods aotri targere ahnt .01 saw the lbeta ni eht pto gtihr (dsOd Ratio = 6, I veei)bel, wihhc hwne ouy leoodk ta het sblael, led ot the hrigt .arwsen

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 +1  upvote downvote
submitted by famylife(110)
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n"A dosd oiatr of 1 nsdcietai thta eth itnodcion or vnete neudr stydu is ullyqae kiylle to coruc ni both ougpr.s nA sodd aoirt tgreera ahtn 1 tediicsna htta the nnocidtio ro vetne is orme lylkie ot crocu in the trsfi u.po"gr (trdiao.whekenitwgsk.aO:/dsd///optiripi_i)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh OR ni eht uperp eftl 22 ltabe is rncietc,or hicwh dohlsu eb 6 2(7626*/3 )=,6 nto .1 sihT eamsn the RO of eta" kiec"soo eosd not gnecha teafr atiifocirasntt yb nd"rak lkmi", os k"nadr kl"im is tno a uo,erdcnfno dna e"ta oecosk"i si nieyenndeldtp ssao w/ EHCE b.turkoae

nO eht hotre nadh, OR rof dkra"n "klmi gedhanc a otl mrfo( 3.9 ot .)01, hhicw actidseni "dnkra lkmi" igmht eb a dforuneocn ,dan ,eeofhtrre is otn dlpenyntdeine osas /w EHEc aro.tbuke

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 +0  upvote downvote
submitted by an_improved_me(91)
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A senoqiut i emor ealylgnre aehv .si..

sI ti psbsolie taht ehnw you rsatftiy the t,ada .i(.e rmigaopcn eht cefeft ttha ngatei iokosce ,hsa in pelpeo ohw nidkr mikl ro ppeoel how od ton dknir kmli) that eth sodd trioa wlil swoh fniscneiacgi ofr eon btu ton the ehtor?

aSid erdffl,ytnie in eth eealxpm v,aboe lcoud tienag siceook ni ppeleo ohw kdrin mkil elad ot a finntisciag reascnei hte krsi of t,nifioecn tub not ni elopep ohw how tdidn' rindk lmk?i

'eIv eklood daonru ni tish teomncm htedra, dna ehva eens elppoe ioenmtn the mert ce"ftef ficdm"ot;naioi is atth hwat ym mxepale bvoea oduwl wh?os

In oethr ,oswrd fi agitne okiosec + diingnkr likm lseda ot a nagsifcinit ik,sr but taieng ocikseo + ont inrndikg imlk ahs on sacsioadte rs,ki ulodw htta amne ttha het lmki sah an eet"cff t"oiomndaiifc on the sikr fo tgnetig iinetcnof in opeelp ohw ate ?ceoosik

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 +0  upvote downvote
submitted by unknown001(9)
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tshi is a uobsn iset.qnuo

henw ddos aitor si ,1 amngine no satancoii,os

sodd tgi;&taor 1, ihwhc ni ihts iqneusto si 6, neasm otsnaacisio

ehwre si odds aroti ? a) ta hte aet tocndkdioeio- rnkdi imlk m.uncol ehnce het swra,en yoln ikcoeo plendennetdiy .sas ithw e olic

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew acn kema nghsit smilpe kiel htsi iyf: aw we tnaw to nowk ewherth o1,Xr 2X eoaecrrlst Y, ew ujts atsleayrep etst X1 nad Y, dna 2X and Y yi.aocgndclr Wen h tets 1X twhi ,Y ew eiqreru no 2X re;upoexs enh W tste 2X hitw Y, ew queeirr no X1 eperosux;

We tets ooecik tiwh eiraha,dr hnew kmil asw tno nkudr (pot r):ghti eoisvipt eW ttse lkim htiw adiaeh,rr nehw on ekioco asw netea l(oerw :itg)rh gievtean

conisounc:l noly koieoc arlrceseot ot eht raeihard

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 -5  upvote downvote
submitted by lilmonkey(63)
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The wydrkoe is sNNaeTo"LcDEYiE.s)"IEDtadP(N Which ni hnamu aageulng emsan OTN" AD"CISETSAO.

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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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