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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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iths uotiseqn aekms me tnaw to aet an e oilc iokoec dan hpeo i ebedl uot

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caitlyncloy  pick C dna ovem no wsa ym yrttsgae :P hlep llo +2
thegooddoctor2  oll doog one +1
sparta  OLL atnhk ouy ofr htis cmtonem +


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 +15  upvote downvote
submitted by ∗doodimoodi(74)
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iDd on oen octnie htat het Osdd roati no het otp ftel is own?rg Am I smignsi misn?htoge If uoy aclautelc ti, is't 6 just lkei teh opt ihgtr .e..on.

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mjmejora  ashtt uatclyla ylaler ynnfu +
yex  uaeBesc I siad ,so papiles e.hr..e -:/ +1
doodimoodi  tnaC iebevle we ayp 60$ orf thsi rcap +50
aisel1787  tsbe mcmnote )mooiidddoo +1
b1ackcoffee  htat ukfgcin retwh em off no .eamx I swa keli si eehrt na cfteef itcifdominoa yb "toN ngdinrik .milk" het ku!fc +2


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 +8  upvote downvote
submitted by ∗sne(59)
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RO ;1tg& taiecisnd acdsreein eeccunrrco of n.evte heT loyn OR aetregr hatn 1 aws in hte betla ahtt dtcinadie atht the sbjcteu aet ekcosoi utb di'tdn dirnk ilm.k ush,T ttah is eht noyl eno iwth a iginfcnaist ncrucoeerc

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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 opeelp how yneaelrlg adh ubeolrt ndrgaei teh wto asht:cr

stirF a:hctr eW estreapda teh etreni utpoloaipn oint wot mlrlsea puotipalons to test ofr teh ooeskic f.tfeca nI lnpoatoiPu A kndr(a lmk)i reeth swa an dsdo iatro fo 6 pyot( ni het aculat rt.a)ch In Patnoipoul B d(id nto ikrdn )kiml rthee asw an sodd rotai of 6. cneiS eht dsdo ratosi rea ont 1, ew anc noldecuc ttah hte ocoksei veha an effcte sgreadeslr of teh aoutpinopl ei( kradn iklm elppeo ssevur d'ntid drikn milk pp.)oele

oedSnc htra:c wNe est of psaiuplnoot ot estt for eth eecfft fo kli.m nI opotPiulna C (eat )keiocso teerh saw na dsdo ratio of 1. nI nouaPpiolt D (did not aet kiec)oos ehter wsa sola na odds iorat of 1. hTis nmaes atth lmki did ont have an tcfefe eerv dna n'itdd tiotebcunr to teh as.sedie

n"Oly ookiesc ear npyiedntdelne tessocadia hitw E. cloi e"sacs emnas hatt yonl eth csiokoe esauc eth aeidsse uihwtot eth tfscfee fo gsihnomet .seel

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 +7  upvote downvote
submitted by ∗pg32(218)
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The caft hatt eth dsdo ritoa in eth pot tfel is increocrt ekams htsi ueniotsq ervy lfu.cifdti It kemas it apaepr as fi the ocekiso rae civtaeuas but het lmki hda mseo ecepvrtiot acrt.of oS .ouoxobsin

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drpatinoire  God I tuhohgt tylatlo teh asem ywa sa uoy dd.i I asdrte ta shti sontuqei for at aelts 5nim and eadks lmyefs hs'twa owrgn ithw my tssaic.itts +1


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 +7  upvote downvote
submitted by ∗youssefa(162)
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lIyinilta klim ikndinrg asw esatcidoas htwi ol.Eci tarboeuk iwht 93=.OR adn 10t0P.l&;0 (ctn.f.n.iSiga)i fretA sittinaortafci iton eta csiokoe nad did ont ate oeiscko RO eabmce 1 detsian fo .39 gneainm eht csoiaaostin ep.depasaidr f,rhoeeerT ainteg osieock saw a fodeuonrcn nad reeht si on rlea iiascsaotno teeebwn rdkiingn milk dna e.ocE.idan,.tsi..l iml'sk th(e rcufnn)eodo innctoruoibt swa niseoerlsbp for the RO of 3.9 ni eth tsifr cplea. Tshi wsa rrudhefte ordsmedtnate wtih OR fo 6 in eth oikoecs aoenl pu.rog

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 +1  upvote downvote
submitted by ∗sattanki(82)
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hsiT eno eehtr erew ufro odsd o,sairt oen eopvdird erund heac ale.bt ehT ynlo eon taht hda an sodd orati retrgae ntah 10. asw het eblat in eth pto thgir (dOsd toiRa = 6, I l)vbeei,e hcwhi hwen uoy kolode at teh lelsa,b eld to eht tgihr anew.sr

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 +1  upvote downvote
submitted by ∗famylife(110)
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n"A osdd oatir of 1 tindseaic ahtt the ociidtnno or ntvee udrne ustyd is uqllaye eyilkl to ouccr in otbh upr.gos An ddso oairt rtargee tnha 1 nsdceitia atth het indctnooi ro nvtee si oemr kliyle ot ccruo in the frits puorg." (_kiwO/edpnrd.k/g:tsar.oipi/i/aittowhedsi)

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 +1  upvote downvote
submitted by xw1984(8)
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eTh OR ni teh eppur eltf 22 tbael si errtcin,co chwhi duhsol be 6 2(7/6*362 ),=6 ont 1. shiT anems het RO of eta" iksc"ooe dseo nto agecnh aretf rcsaioniattfti by an"kdr mi,kl" os "drakn lm"ik si ont a foo,cudenrn dna a"te koscieo" si ytddeelinenpn sosa w/ HEEC .eokbratu

nO the oerht anhd, RO rof dn"rka "kilm anedcgh a tlo ofr(m .39 to 01.), whcih iadticsen kdn"ar lmik" tgmih be a oeoudcrnnf n,ad eroterfe,h is ton ynenenltddipe osas /w EcEH o.aruekbt

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 +0  upvote downvote
submitted by ∗an_improved_me(91)
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A nsqteiou i remo grenlyale eahv i..s.

Is ti sbspoeil htta when oyu yitsfart het ,aadt (e.i. nopicamrg eth cffete ttha tgneai sokicoe sha, in lpeeop owh knrdi ikml ro ploepe who do ont irdnk )mkil ttah hte osdd itaro llwi hwso enicfigicsan ofr noe tbu ton hte t?eohr

idaS fnifredylte, in the xelmeap a,oevb duclo einagt koceios ni oplepe how nkrdi klmi lead to a saicnifignt nesaerci eth ikrs fo f,tinoeinc tbu nto ni pepleo how hwo int'dd dirkn ?lkmi

Ie'v kdeool nuarod ni htis ocntmem terd,ha dna ehav snee pepole nmeotin hte emrt cfe"fet otn;micf"iodia is ahtt ahtw my eexamlp ovabe dlwou so?wh

nI ehtor rwod,s fi ngeita keoicos + ikdnrign ilkm aseld to a nniasgitfic rs,ki utb teniag ocesoik + ont niidrnkg likm sha no adestiacso srki, douwl htat naem taht hte iklm sha an "eecftf ooifitn"imdac no het rsik fo ttenggi enctoinif ni lpeeop woh ate ckioso?e

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 +0  upvote downvote
submitted by ∗unknown001(9)
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stih is a osnbu .nsquoite

enhw sddo itroa is 1, enmgnai no aiso,tcainos

sdod tg;artio& ,1 hihwc ni htsi qoisetnu si 6, naesm soaiainocts

ewher is ddso atrio ? a) ta teh tea ooidekt-dncio kindr lkim ol.umnc hceen eth r,easnw ylon oiceok eynednndlipte .ass iwth e clio

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 +0  upvote downvote
submitted by ∗tyrionwill(22)
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ew anc eakm sthgin ipmles kile isth aif y:w ew wtan ot kwon rtewheh ,1rXo 2X eoletcrrsa ,Y we sjut selrpayeat sett X1 dna Y, adn X2 dna Y cgclroyin.ad Weh n ttse X1 hitw ,Y we eiqrrue on X2 eupx;roes eWh n stte 2X twih Y, we requier on X1 ee;rxpuso

eW etts okeoic ithw rehairad, enwh mkli swa ton rndku p(ot gti)rh: vsepoiit eW tets klim twhi eraria,hd ewnh no coikoe aws tnaee elrow( i)rthg: ieatenvg

ncsinuco:lo only ocoeik rcletreaos ot eht adriaher

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 -5  upvote downvote
submitted by ∗lilmonkey(63)
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eTh owkdyer si Psa.NDITidNEYEEaN(DLteso)c"" hhicW in aumnh galeagnu esnma NT"O ADSCI.AE"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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