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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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this isntoequ samke me wtna to tae an e lcio ooeikc adn ehpo i ebdel otu

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caitlyncloy  kipc C nda omve on wsa my teyarsgt P: lhep oll +2
thegooddoctor2  oll odgo one +1
sparta  LOL htnka ouy for sith ecmnomt +


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 +15  upvote downvote
submitted by ∗doodimoodi(74)
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dDi no one teicon atth hte Odsd taroi on hte opt etfl is no?wrg mA I snsiimg mehtgs?oin If ouy atclacleu t,i sit' 6 ujst keli the opt tihrg e..on..

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mjmejora  sttah layltuac erayll nnuyf +
yex  suaceBe I aids ,so lapsepi e.r..he /-: +1
doodimoodi  atnC elebive we ayp 0$6 fro ihst pcra +50
aisel1787  tbes montmce oidod)oidom +1
b1ackcoffee  tath niufgkc twher me fof on .emxa I saw lkei is eehtr na efcetf iamfontdoici by otN" giknirnd m.ikl" teh f!uck +2


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 +8  upvote downvote
submitted by ∗sne(59)
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OR ;g1t& ndtseicai eiasncerd neoucecrrc fo eet.vn eTh lyon OR erragte ahtn 1 wsa in teh atbel taht acetdidni ahtt the jetsbcu tea kcoseoi tub in'tdd nridk l.mki suT,h htat si teh onyl eno ithw a asgnfticiin rcnecrecuo

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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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roF epoelp who ynlgeerla adh orelutb dagenir het wto ha:trsc

trsiF tca:hr eW spdetaera eht teneir uonlptpoai toni tow lsrmael sapilopuont to test orf hte koeosci tfe.fca nI ntuoolaPip A krnda( )kmli ehrte wsa an odsd aroit of 6 ypt(o in the auctla r)tahc. nI pPounotali B idd( otn nkdri km)il ehert saw na odds itaor fo 6. niecS het ddos artiso rea not 1, we nac cucoednl atth teh iksooec aehv na fteecf rleagedsrs fo hte ptuloiaopn (ie dkrna ilmk eopple suevsr idtd'n krnid klim po.eep)l

Soednc cat:rh eNw tse fo sonpotplaui ot stet rof hte ffcete fo .mlki In nlPtouoaip C a(et ekocos)i hteer aws an sddo iroat of 1. nI piauotonPl D idd( ont tea sci)eoko ethre saw lsao na dosd ioart of 1. hiTs mnsea atht limk idd nto have an ftecef eevr adn ni'dtd btteocuinr to hte isae.sed

Ony"l kciesoo are yilnnndtdepee tceiasoasd hiwt .E ilco sacse" nmsea that nyol teh sikcoeo auecs teh eisdaes othiwut the esefctf of mhtsineog lse.e

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 +7  upvote downvote
submitted by ∗pg32(218)
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eTh ctfa thta hte ddos rotia ni the opt eflt si nccoertir asmke itsh eunitoqs vyre clftuidi.f tI kmase it ppaera sa if the oceoiks ear seiatcauv ubt hte lkim hda meos rpciotetve a.cotfr oS buoxsioon.

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drpatinoire  oGd I uohtgth ltytola het esam awy sa yuo .did I rsatde at shit nuqetois orf at eatsl nm5i dan aekds lyfems thwas' wrngo thiw my .ittciassst +1


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 +7  upvote downvote
submitted by ∗youssefa(162)
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alinyItli imlk gdirnnki swa atciesoads hiwt loci.E kbrutoae tiwh 9O.=3R and P&;00lt10. g.niSt..i)anc(fi Areft osittrncaaifti into tae ockosie dna ddi nto tae iookesc OR abemce 1 idastne fo 9.3 naengim eht inissotcaao reda.piepads oT,rreeehf tiagen kioceos aws a donfenrcuo nda ehret si no earl ooncsatisai etnebwe iikgdrnn imlk nad i..Eon,ts..d.cliae m'lksi t(eh dn)oceufron ncoriiutbtno saw lespoebrsin fro hte OR of 3.9 in teh tirsf a.elpc sTih aws fderetuhr ndesardottme iwth OR of 6 ni hte soecoik anoel ugrp.o

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 +1  upvote downvote
submitted by ∗sattanki(82)
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isTh neo ether ewer oruf osdd t,oairs oen depdoriv edrun each e.btla The nloy eno ahtt dha na odsd iator rraeget tanh 1.0 aws the eblat ni eth top hrgti (sddO tRoai = 6, I iee)leb,v ihhcw hewn uoy ledoko ta hte lbae,ls dle ot eth tigrh se.wnar

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 +1  upvote downvote
submitted by ∗famylife(110)
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"An sddo rotia fo 1 tiaecsdin hatt eht ntioinocd or tneev dnrue dtuys is lyuealq ilykle to urcoc ni hbto prus.og nA sodd atrio etgarre ahnt 1 itdsaiecn tath eth ndtiionoc or evnte is omer yellik ot cuorc in eth sftir pgru.o" (ihd/_erinewpids/.grkokw.dsiiOatttap//o:i)

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 +1  upvote downvote
submitted by xw1984(8)
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ehT OR ni hte purpe flte 22 baetl is ,teroniccr wihch dluhso eb 6 7(26*6/23 6),= ont .1 sTih amsne het OR of "aet oicke"so edso ont hcagne taerf itrfsnitaoacit by dka"rn lki"m, os k"ardn klim" is ont a ennfrcoou,d adn te"a sico"keo is yndnpeidteeln osas /w EHEC ukreaob.t

On eht trhoe ,ahnd OR fro da"rnk i"lkm cenhdag a lot omrf( .39 ot )1,0. wchhi andesicti k"anrd "ikml tmgih eb a onedronufc dn,a efet,rehro si tno etlnyneidnped ssoa w/ EHEc atber.ouk

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 +0  upvote downvote
submitted by ∗an_improved_me(91)
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A iusotenq i roem gelyeranl vhea ..is.

sI ti lieopbss htat wnhe oyu fttrisay eht td,aa (ie.. conriamgp eth fcfete htat igenta cokisoe sa,h in lpopee hwo nkidr limk or ppoeel who od otn kdirn ilmk) that eht dosd itrao iwll wsoh eiicnfgsanic for neo ubt otn hte rtoeh?

Sadi etylndefrfi, in eth pmexeal evb,oa uocld gnteai seciook in peolep owh dnrki ilkm dlea to a tncsinfiagi eecsrani teh rsik fo co,intfein ubt not in epleop hwo ohw dnd'it rdkin ?mkli

I'ev odolek naodru ni hsit otecmmn retd,ha dan ehav eens eppelo niomnte eth emrt f"ecfte iicn;otadifo"m is hatt atwh my axmeepl aebvo dwlou hs?ow

nI hetro d,rosw if gtaeni coiekso + gkindrni lmki eadls ot a gistfninaci sirk, tub eagitn ecoikos + ton ndknigir ilmk ahs no ceidaaosts kr,si dulwo ttah anem atht eth iklm sah na ce"tffe tfco"idiamnoi on eth sikr fo gtgtine ftcnionie in plepoe how tae eicosko?

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 +0  upvote downvote
submitted by ∗unknown001(9)
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hsti si a bonus u.oseniqt

ehnw osdd irato si ,1 gemiann no noiots,sicaa

ddos ;ttog&ira 1, hwchi in siht inotsueq si ,6 mnase octiiossnaa

rweeh is dsod aiotr ? a) at het eat ideiot-oconkd dirnk klim omc.lnu enhce eth sa,enwr noyl kiooce ndytenenipdle ass. twih e ciol

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 +0  upvote downvote
submitted by ∗tyrionwill(22)
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we acn maek hgints ipseml ikle htis :fyai w we awtn ot nkwo erhewht Xro,1 X2 rctoslreea ,Y we usjt rsaetelapy etts X1 adn Y, nda 2X nad Y .lyrcaignocd n eWh etst X1 iwth ,Y ew eeirrqu no 2X sepeoxr;u e nWh tets 2X wiht ,Y we rueiqre on X1 ;exrsoeup

We sett eockoi ihwt iae,harrd nhwe imkl saw ont kdnru tpo( tgr:)ih iitesvop W e sett ilkm hwti hairrea,d nehw no ckoeoi saw entae ewo(lr ri:th)g gevetani

col:ncounis nyol eiocok rtocserela to teh idearhra

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 -5  upvote downvote
submitted by ∗lilmonkey(63)
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The rkwydoe si D"tEN.NE(csi)NYEaT"DoseaPIdL Wcihh ni huanm uneaaglg sname ONT" .TAS"AISEOCD

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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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