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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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hits eiutonsq mkeas me awnt ot aet na e cilo koceoi and hpeo i lebde out

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caitlyncloy  pkic C dna ovem on was ym atetgrsy P: lhep lol +2
thegooddoctor2  llo dogo eno +1
sparta  LOL kahtn you for hsit mmotenc +


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 +15  upvote downvote
submitted by doodimoodi(74)
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diD no noe nieotc that eht ddOs raoti on the pot eftl si own?gr Am I nisigsm tgnoimeh?s If oyu ellutccaa i,t i'st 6 juts ekli hte tpo hgrit o..e..n

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mjmejora  astth lytaluac lelyar fyunn +
yex  uaeBesc I sdai so, epiapls e.hr.e. -:/ +1
doodimoodi  Ctan vleibee we pay 6$0 rfo sith acrp +50
aisel1787  sebt emmtcno odiod)modio +1
b1ackcoffee  that uicngkf hewrt me off on m.aex I wsa keli is rethe an ecfetf faitmincidoo by to"N rdiningk lmik." hte k!fcu +2


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 +8  upvote downvote
submitted by sne(59)
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RO 1t;&g einsactid aisecdern ecornucrec fo evne.t ehT ylon RO grteear ahtn 1 wsa ni eth belta ttha etdaidinc ttah teh ejtucsb ate kcooise utb 'itddn nirkd kim.l Thsu, ttha si eht loyn eon ithw a iantigfnsci rocccunere

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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 eppeol how lgyelrean hda ltrbeuo digrnae teh otw :hatrcs

trsFi trca:h eW setdparae the nrieet otpuniploa otin wot smalerl soapplutoin ot stet rof hte eocsiko ftc.efa In npooitPlua A (nkrad lkmi) heret asw an sdod tario of 6 poy(t in hte uatalc h.tarc) In toauiPlpon B i(dd nto nrdik )mkli hrtee swa na sddo orita fo 6. Scein the dsdo otisra aer otn 1, we nca ondecucl htat eth ikooecs heva na ffceet sedlagsrer of eht ailtnupopo i(e dakrn ilkm ppoeel vusers in'tdd ikrdn klmi ppl.eeo)

dncoeS :chtar wNe tes of oiuplptnsao to sett rfo the ceffte of l.ikm nI pnoPaoluti C et(a )iseckoo hteer aws an sodd rtiao fo .1 In inPuaoptol D dd(i nto tea secoiko) reteh aws soal an osdd taori fo .1 isTh namse that lkmi ddi ton evha an ceetff reve dan nd'tid teoitbrunc to hte saieesd.

O"nly secooki era epiyldendtnen eiaatsdcso thwi E. icol asc"es msnae htta loyn eth cioesok ucase het edaisse hwutito eht eesfcft of snmtgoieh slee.

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 +7  upvote downvote
submitted by pg32(218)
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eTh atcf that the dods traoi ni hte opt tfle si rotcciren skmea shit otesinuq yvre f.idtcfuli It sakme it apaper as if the ioecosk ear aeacsuivt utb the lkim had oesm tceoitrvpe .trfaoc oS bnoi.sooxu

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drpatinoire  God I gtuohth alttyol the smae way as uyo dd.i I asdetr ta hits qtioneus fro at alset 5nmi adn easkd sylmef wh'sat nowrg thwi my atstscsi.it +1


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 +7  upvote downvote
submitted by youssefa(162)
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tialnIliy ilkm drikning saw soatsecida tihw Eo.ilc bekrutao htwi 3OR=.9 nda lt&.100P;0 i).Sgitfai..(nnc erfAt irtiaoatnsfict iton ate ociekso dan ddi nto aet oioekcs RO amceeb 1 ntaiesd fo 93. gnamine eht toaioicassn idr.padepsea eerorT,hef iatneg coekois asw a funcoorden dan teehr is no eral nicioosaats eewenbt kngirdni klmi adn o,.cl..nsiieaE.dt. mi'ksl th(e fneroun)ocd tnbtnriooicu wsa isporslbeen for hte OR fo .93 in eth stfir c.elap hsiT wsa rtfeedhur sdotteadrnem hwit RO of 6 ni hte kscoioe oanel .pogru

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 +1  upvote downvote
submitted by sattanki(82)
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iThs noe rheet were rufo sodd srito,a one pvodider nrued aceh .tebal Teh loyn one ahtt hda na dsod tiroa aeetrgr naht .10 wsa het blaet in hte tpo grtih (dsOd iRtoa = 6, I l,eieebv) whhic henw you okdeol ta hte ,lleasb dle to hte htirg esra.nw

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 +1  upvote downvote
submitted by famylife(110)
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nA" dsod rotai fo 1 isnadtiec tath hte niooictnd or enetv drnue tusyd si luaqyle lyilke ot ccuor in othb .orgspu nA odds iarto artreeg athn 1 dcaietisn htat eth dnitnocio or entve si eorm llyike to corcu in het tsrfi ".group (_rkt.aiwdirogswanip.ke:hti//despoOdii//t)

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 +1  upvote downvote
submitted by xw1984(8)
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heT OR ni het repup fetl 22 eblta si ,ccrneroti wihch uhosdl be 6 72(*/2366 ,6)= not 1. Thsi nsame eth OR of tea" iceoso"k odse ton echang aefrt niiiatsfottacr yb ankd"r m,i"lk so akn"dr imk"l is ont a on,urcfenod adn t"ae ieok"cso is yeeddptnelnni ossa w/ CEEH a.etorukb

On eht etohr d,hna OR ofr nark"d k"lmi hcgaend a lot mofr( .93 to ,0.)1 ihwhc tsdicneai dka"rn mkli" gihtm eb a oudnfrceon and, eehrf,teor si not eplniteydndne asso /w EcEH a.utobekr

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 +0  upvote downvote
submitted by an_improved_me(91)
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A ouetinsq i more ylreleagn ahve is...

Is ti bsplseio atth enhw oyu ittryfas teh atad, .(ei. pgainmcro the ecffte that eagnti seockio as,h ni lpepoe owh kdinr mlki ro elppoe who od nto dinkr l)imk atth eht sdod raiot lwli sohw figneiacnsic rfo oen but otn het o?ehrt

Said nfetyr,edlif in hte lxeaemp eov,ba udloc netagi iosckeo ni pleoep ohw nkdri kiml aled ot a citisaginnf aniecsre the sirk of i,fcinnoet tub ont in peloep how who itdn'd ikrdn ?lmik

'evI eokdlo odnrau ni iths nmocmet adher,t and vaeh ense peeopl enitmon hte ertm tece"ff i"mfn;aiodcito si taht what ym leexmap bevoa lowud h?ows

nI oreht w,odrs if etgina ieoskco + dnkiirng klmi dlsea to a ctaingfsini krsi, btu naietg iosoekc + ont rinknidg imkl hsa no aesdicsota ikr,s duowl taht mnea ahtt hte lkim sah na "ceftfe tnaioomc"idfi no hte sikr fo itntgge ieinnfoct in opepel who eat iscokeo?

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 +0  upvote downvote
submitted by unknown001(9)
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tshi si a bnous uin.etoqs

hnew ddso iotar is 1, gmenian on o,tanosiscia

sddo &tg;ratio ,1 wchhi ni thsi tuenqiso si ,6 asnem iosntaoacsi

werhe is dsdo raoti ? )a ta hte eta ekooo-idicntd idrnk kilm onlcmu. cehen eth r,saewn noly ocoike lneyptindedne .ass itwh e iloc

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 +0  upvote downvote
submitted by tyrionwill(22)
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we nac kaem nsihtg emslpi ikel tihs a:iwfy ew nwta ot nwok heehrwt r,oX1 X2 lracrsteeo ,Y we jtsu tarleyepas tset X1 nda ,Y and X2 dna Y danlor.igycc enWh tets X1 ihwt Y, we irqereu on X2 ee;ospurx hW en stet 2X whti ,Y we ueeqirr on X1 xu;srpoee

eW ttse okoeci tiwh ea,ahirrd nehw imkl aws otn nrdku op(t :)ghirt ipsitevo eW sett lmki tihw dh,riraae ewnh no ockieo aws tenae orw(el ir)thg: aeengvit

cuonlocnis: oyln ieckoo sacotrelre ot the aerdriha

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 -5  upvote downvote
submitted by lilmonkey(63)
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Teh owdkeyr si (PcedENtNi.)YITELNos"DsDEa"a hciWh ni numha euglnaag manse NT"O CAOS.IAD"SET

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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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