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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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itsh eonqsitu sakem em tnwa ot ate an e lioc keocoi and ohep i ledeb tuo

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caitlyncloy  kipc C dna omve on saw ym esryttga P: hlpe llo +2
thegooddoctor2  lol doog noe +1
sparta  LOL ktnha uyo orf hsti enmtmoc +


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 +15  upvote downvote
submitted by doodimoodi(74)
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diD on neo tnocie thta hte dOsd tario on teh top lfte is ?wrgon Am I missnig oig?snmteh fI oyu ltlecuaca i,t 'its 6 sujt lkei eth otp girht ..e..on

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mjmejora  athst cualytal layerl ufynn +
yex  ecsaBue I sida so, ilsapep re...he /:- +1
doodimoodi  ntaC lieeebv we yap $60 ofr hits rcap +50
aisel1787  tbse tmnmeoc iooododimd) +1
b1ackcoffee  htta ugnkifc rwhet em off on me.xa I swa keli is reeht na tceeff nmiftdiocoia yb N"ot ndirkngi mk.l"i het uf!ck +2


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 +8  upvote downvote
submitted by sne(59)
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OR g;t&1 nsedictia residaecn rorcuceenc fo .entve heT nyol RO rgeeatr atnh 1 swa in teh teabl atht iadidtnec htat het sebtucj eat ckeoois tub 'dtnid kridn m.ilk s,hTu ttah si eth nlyo one hwti a nisaitigcnf uocnceercr

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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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Fro eoplep hwo ayellnrge dha erlbout naeidgr het owt cr:atsh

Frsit ar:hct We rdapteaes the teerin nuopipotla niot tow mealrsl apiooptusln to stet ofr hte coiokes a.ftfec In ptoiPlnauo A dk(rna )klim erhte aws an odds aoitr of 6 (topy ni hte ualatc hr.c)at nI uoinpltPoa B did( not krndi )mikl htree saw an sodd traoi fo 6. ncieS teh ddos torsai rae tno 1, we cna ldeouncc htat hte iokseoc aveh na fetfce adgeresslr fo eht poiolpatnu e(i ankrd lmki eppole revuss 'idtdn drkni mkil elpp).eo

ceonSd tahrc: weN ste of tniulpspaoo ot sett for hte fetefc fo mkli. nI ipPouolant C tea( ocs)oike rehte was na dsdo oirta fo 1. nI lauonpPoit D id(d not ate )cekisoo ethre asw olas an ddos iatro fo 1. sihT means taht imkl did tno evha an ffeect erev nad 'ntidd rtictuoebn to hte seis.aed

n"ylO ecisook ear tyeeinenldnpd etiossadac whit E. oicl "seasc sanem thta olny het okosice cesau the desesai thiotuw eht setceff fo hmgineots .eles

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 +7  upvote downvote
submitted by pg32(218)
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hTe ctaf ttha eht sdod iorat in teh opt flte si otrcirnce kmaes hsit iuosnqte vrye udtcf.iifl tI aesmk it eappar sa if eth okecois rae vtsuecaai tbu het milk dah emos eveptiorct arfcot. oS onos.oiuxb

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drpatinoire  odG I tgutohh yltlato het meas awy as oyu .idd I esdatr ta htis qsuntieo rof at elsat min5 dna sekda esymfl h'atsw rgonw ihwt ym s.stcttiasi +1


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 +7  upvote downvote
submitted by youssefa(162)
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ialilnytI ilmk gidiknnr was iadcssaeto ihwt oiElc. tkoebuar ihtw 9.=3RO nad .00&0tPl;1 )Satgicn.f(i.ni. eAtfr csraittointafi toin eta okseioc dna did tno eat eoscoik RO emcbae 1 dtnisea of .93 migeann hte oinaaosicts rpd.eiepdaas eo,eTerrfh ieangt okosice aws a oufconndre and hetre is no lear otsanaiicso eetnweb rnidikng ilmk nda l.d..aE.secint.o,i m'lkis h(et nfcr)nudooe unbnirociott was ibossrleenp for eht OR of 9.3 in hte isfrt pea.cl Tshi saw uerhrtfed erttdmsdoane hwit OR fo 6 ni het ckioeos laoen rou.gp

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 +1  upvote downvote
submitted by sattanki(82)
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Thsi oen teehr rwee fuor sdod rs,aito eno pvdedori nurde heac e.lbat heT nloy oen thta hda an ddos atrio teragre hnat .01 was teh aelbt in the opt irtgh (Odds itRoa = 6, I blvi)eee, ihhcw newh ouy olekod at eht ale,lbs led to the griht w.senar

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 +1  upvote downvote
submitted by famylife(110)
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nA" sddo aoirt fo 1 isicneatd taht the itcnoonid ro eevtn rdeun usdyt is lquayle yiellk to cruoc in bhot prgo.su An ddso raito reeagrt hnta 1 itasiedcn hatt eth ndinotcio or vtene is rmeo eylkli to occru in eht frist ".rupgo (d_:tgireiaahk/r/estwsiiip.okwnOi/to.p/dd)

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 +1  upvote downvote
submitted by xw1984(8)
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ehT RO in teh rpuep fetl 22 baelt si ,rnicrecto whcih dlusoh eb 6 (276*3/62 ),=6 ont .1 iTsh nemsa eht OR of te"a oe"ikcos odes tno gehcna tfare irtnfaatistcio by akr"nd "im,lk os dr"akn ikm"l is not a ,odnunceorf adn "tea kcseioo" si nddnliypeeten soas /w CEEH bakt.uroe

nO teh herot hn,da RO ofr "dkrna li"mk ngdheca a lot or(mf 93. ot ,.)01 iwchh iincetdas krna"d kml"i ihmtg be a durconoenf ,nad thfe,orree is not neddlyenntipe ssao w/ cEEH utaobkr.e

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 +0  upvote downvote
submitted by an_improved_me(91)
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A ntsiueoq i omer aynlelrge aevh .i..s

Is it eisbposl htta hnew uyo tsifaytr het ,atad ..ei( pngiocmar teh eefctf atht anteig seoikco sha, ni opleep owh indkr klmi or epeolp ohw do ton inkrd kl)im htta eth sodd roait wlli hswo cnscnfaegiii rof oen ubt nto het hr?ote

iaSd nfye,edrlfti ni eth xpeelam ,vboae odulc eatign cioseko in leeppo ohw rdink imlk lade ot a itiainnfsgc nsriacee hte kisr of fi,nenciot tub tno in oleepp hwo hwo idtn'd dknir mli?k

I'ev dookle nrdoua in htsi mmctone ,athdre nda ahev nees eplepo menntio the ermt tf"eecf fiancimdioo;"t si ttha atwh ym emlapxe oeabv dluow w?soh

In hoert r,sodw if gaient keosoci + ikidngrn kmil eadls ot a sftnigciina srk,i btu eanitg keooisc + tno girknndi mkli ahs on iaoecadsts srki, olwdu thta name htta teh likm ash na "fctefe fomiciiatnod" no het sikr fo ggnetti nntceifio in olpepe hwo tea c?ooskie

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 +0  upvote downvote
submitted by unknown001(9)
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ihts si a ubons u.toenqis

nehw ddos tiroa is ,1 gnnaeim on otsaaiiocns,

ddos ra;&togti 1, hciwh in this sqeonitu is ,6 mnsea csioinaoast

ehwre si osdd aroti ? a) at eth eat eincodtodk-io irdkn mkli nuc.oml eecnh the wasrne, lyon eokico ienyendnptdle ass. with e ocil

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 +0  upvote downvote
submitted by tyrionwill(22)
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we nca eakm igntsh sleimp eikl htis fi:way ew watn to know heewthr X1ro, 2X tsoraleecr Y, we tjsu etaalpeysr tets 1X and ,Y dna 2X and Y oynrigldac.c eWhn ttes X1 wthi Y, ew eeurqri on X2 peeosuxr; Wh ne ttse X2 ithw Y, ew euerrqi no X1 urexeos;p

eW etts eiokoc twih driaeah,r nwhe likm wsa tno nrkdu opt( gr)ith: ivpotise W e tste ikml wiht edraira,h hnwe on cekioo wsa eetna (oelwr rgt):hi geavetni

:oscconiuln olny okcioe olesectrar to eht areidhra

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh eowkydr si YTicastoa"NsEDI.dEPNDe(")ELN hhiWc in anuhm ungegala sanme "TNO ASCAD"IE.SOT

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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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