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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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tshi qeoutisn ekmsa me wnta ot tea an e lioc iokeco dan hope i delbe tou

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caitlyncloy  pick C and eomv on swa my tsgtaery P: hple lol +2
thegooddoctor2  lol good neo +1
sparta  OLL hatnk oyu orf isth mncetom +


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 +15  upvote downvote
submitted by ∗doodimoodi(74)
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Ddi no one niocet htta eht sdOd oarit on het top tlfe is orwg?n Am I sginsim othsemin?g fI ouy callcuate ,it s'ti 6 usjt leki teh opt tirgh eno....

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mjmejora  sthta ctalayul llayer fnnyu +
yex  easueBc I isda ,so paelips .eh.er. /:- +1
doodimoodi  Cnta beevlei ew pay 0$6 rof stih arcp +50
aisel1787  stbe oemmtcn odoi)ooidmd +1
b1ackcoffee  that unfkcgi tewhr me off on x.ame I was eikl is terhe an efftce fodiiicntoma by Not" dirinkgn l.k"im the fuc!k +2


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 +8  upvote downvote
submitted by ∗sne(59)
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RO &t1g; siatdcien ncaesierd crnerocecu of ve.etn Teh nlyo RO rrgaeet than 1 was in teh ealbt htta tiniddace htat the uebscjt tea oskceio tbu t'dind rkind ki.ml suhT, thta is eth oyln neo htiw a gfiniiansct ucocecernr

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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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orF peepol how graneelly dah ulberot erdgain teh two t:hrcas

tsFri crta:h We aeedrapts teh irnete aotouipnlp onit owt elaslmr naoiutspopl to ttse fro teh cseiook a.tfefc nI ilotnuaPpo A k(rdna kil)m trehe was na sodd atori fo 6 (tpoy in eth ulaact tch)ar. nI npoialuPto B dd(i not nikrd )lkmi trhee wsa an odds rtoai fo 6. eciSn teh dods srtoia are nto ,1 ew can donceucl atth het oscoiek vhea an efetfc sslrgreaed of eth looappiutn (ei nradk ilkm epeopl uvrsse nitd'd kinrd likm ep)lo.pe

nSdceo ar:cht New tes of onotsilppau to tets orf eth teffec fo l.mki In pnuPioltoa C ate( oikecso) htree wsa an dosd arito of .1 In taunoolipP D dd(i otn aet osoi)eck hrtee aws oals an sdod oatir fo 1. Tish emnas ttha klim idd ton vahe an tfeefc vere adn tnd'di brnutcieto to hte a.isseed

"nyOl sikoceo aer nlnedpieeyntd asscdoatie wthi .E cloi "aecss measn atth ylno the oscieko ecasu eth dieases tuothiw hte ceteffs of snthogiem eel.s

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 +7  upvote downvote
submitted by ∗pg32(218)
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The actf ahtt eht sdod itoar ni eht pot etlf si oercintrc meask tish uitnoesq ervy .luifidftc It emska ti appera sa fi eth koicose rae eitcasavu utb het kmil adh meos voerttipce acfrot. So bsounioox.

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drpatinoire  doG I thguhto tolltay the emas ywa sa oyu d.di I setdra at itsh unsiteqo orf at laste in5m nda esadk lmsfye tw'sha gornw hwit my sit.tsistac +1


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 +7  upvote downvote
submitted by ∗youssefa(162)
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ilntailyI kmil inkrignd was acoseitdas wthi c.oilE ukraebot whti R=.39O nda ;0.lPt10&0 gSfa(nc.nii)i.t. terfA saoattinrfiitc ntio tae esiookc dna idd not tae oioscek RO eaembc 1 sditaen of 9.3 nnmieag eht aaniooissct pd.daaserepi ,eerfToerh tagine oociske wsa a nurfnoecod dna herte is on elar soacitinaso beetnwe nrdingik lkim nda .et.i,Edlon..csia. m'skli (eht eoro)nnucdf uociotnbirnt swa liseperosnb for eth RO of .93 ni the isrft e.lcpa hiTs asw uhdrtfeer rtsdomdtenae hitw OR fo 6 in eht ecosiko enloa .rpugo

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 +1  upvote downvote
submitted by ∗sattanki(82)
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hsTi noe ehter weer fuor odsd sro,iat eno oipeddrv nrdue chae tealb. The lnoy oen ahtt had an odds atior ratrege tanh 0.1 aws the elbat in het otp tgihr (dOsd aRtoi = 6, I vei,elb)e hiwch nhwe oyu edkolo at het slblae, led to the hgtri r.asnwe

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 +1  upvote downvote
submitted by ∗famylife(110)
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"An sodd atiro of 1 tiicsdean thta eth ncdtioino ro vteen uernd yduts si eyqalul yleilk to ccuro ni tbho u.rspgo nA osdd tirao eteargr hant 1 aitcenisd that teh tciidnono or teevn si mroe likeyl ot rcuoc ni eht sitrf "gop.ur (:_a/dhis/iittdig.iwir/pke/dpoOknawroe.ts)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe OR ni het peupr elft 22 abelt si rnotreci,c wchhi huodsl be 6 (722/*636 )=6, otn 1. isTh amnes hte RO fo "tea kcioeos" sedo ont eghcna etfar sftaartinitioc yb kadnr" ,ilk"m so k"adrn k"mil si ton a dfu,oocrnne dan "aet oecoski" si ltneedeyinpdn asos w/ EHCE ota.urbke

nO het thoer a,hdn RO orf "kndra iklm" dagehnc a lto o(mfr .93 to 01),. hwhci icasitend "ardkn k"mil hmitg eb a nuroodenfc ad,n rehetf,oer is ont petninendldey asso /w cEHE outbe.ark

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 +0  upvote downvote
submitted by ∗an_improved_me(91)
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A ntoisueq i orme glnarylee hvae .s.i.

Is it epioblss ttha enwh uoy iysfttra the a,tda .e(.i pirmogcan the ffceet that gtniae iokseoc ,ahs in lppeoe who rdink lmik or elopep woh od tno dnirk )lkim that the dosd oitar will hosw iccganisinef rof eon utb nto het ?ohetr

Sdai lffrie,detny ni teh elemaxp va,beo ulodc atnieg okcsioe ni oelpep hwo rdkni kmli ldea ot a sinctfangii easrinec hte iksr fo ,nticifeon utb not ni elopep ohw how 'tddin ndirk l?mik

'evI oelodk doarun ni isht mctemno ,rdahte adn ehva nese eopepl iemtnon het mrte eeft"cf f;ao"niiodmict si tath htaw ym eelpmxa eavbo ulowd ?ohsw

In etohr o,dswr if aegnit ekiosco + rkgindni lmki lsaed ot a gfsiannicti sk,ri but itenga ickeoos + nto nrkgdnii mikl has on isdteoaasc kirs, lwuod ttah amen ttah the lkmi sha na tfefc"e dnm"oioitfcai no eht riks of gentitg cifietonn in poelpe woh ate ?ikcsooe

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 +0  upvote downvote
submitted by ∗unknown001(9)
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sith is a usnbo tqe.nsoiu

henw odds riaot is ,1 egnmain on asoatsiconi,

ddos ;&ttogria ,1 hhiwc ni hsti oqueints is ,6 nasme saisicantoo

eerhw si odsd tiaro ? a) ta het eat dodonetio-ikc indrk kmil uonc.lm ceehn eth rswe,na lnoy icooke dneteeynpldin a.ss ihwt e ocli

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 +0  upvote downvote
submitted by ∗tyrionwill(22)
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we nca kmae shignt lpsmie leki tish y:wf ia ew want to kwno wethher r,X1o X2 sltereacro Y, ew jtus lyrspteeaa etts 1X nad ,Y dan 2X and Y ngrdyicoca.l ne hW tste X1 thwi ,Y we qrreieu on X2 ;oxuprsee n ehW ttse 2X iwth ,Y we ueiqrer on 1X ruo;esexp

eW stet iocoek hwti ,aiedarrh nwhe lkmi swa tno nkurd (opt )hgrti: vsieptoi eW estt mkil twih raiard,eh nehw no ceoiko was etena owelr( htgr):i inatveeg

lsiocnnuo:c ylon ieokoc acrloeetrs to eth rrideaha

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 -5  upvote downvote
submitted by ∗lilmonkey(63)
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ehT edwoykr is (Da)DoT"cdiEPaNIesNLYNt.EEs" chWhi in aumhn lanuagge seman ON"T IEOCSS."DATA

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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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