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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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hist estquoni mekas em awtn to tae na e iloc ekoico and ehop i belde otu

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caitlyncloy  ckpi C nda omve no asw ym yetragts :P lphe llo +2
thegooddoctor2  llo dogo eon +1
sparta  LLO knath you rfo tish onecmmt +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Did on one teocni ttah teh dsdO raito on teh opt lfet si nw?gor mA I gisnsmi oengsih?tm fI uyo tacacllue ,ti tis' 6 jtus kiel eht tpo itrgh .o.ne..

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mjmejora  staht acytaull relyal nnfuy +
yex  cuBseae I aisd ,os eaplips .re.eh. -/: +1
doodimoodi  anCt ibevlee ew yap 6$0 ofr sith acpr +50
aisel1787  tsbe cemtomn )idoimdoood +1
b1ackcoffee  ttah knfcugi ehrtw em fof no emx.a I aws ekli si ehtre na fefcte odtcaoniiimf by "Nto kigrdnni lk.im" het cukf! +2


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 +8  upvote downvote
submitted by sne(59)
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RO t1g;& neacdsiit sadceeinr recunoccer of e.evnt eTh olyn RO treeagr tnah 1 was in eth ltaeb thta dteaidcni taht eth jutebsc tae oskocie tbu t'iddn ikdrn l.imk shTu, ttah si eht nyol oen htwi a inncsaiitgf rouecrencc

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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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For epelop ohw aeylgerln had tluober aergind hte otw c:hrtsa

irstF :rtach We epsaetadr het ireten oppiunaolt iotn wto lmerlsa lponaustipo to ttes rof the cksoioe eftcf.a nI pilnotPaou A anrk(d ilm)k rtehe asw na ddos tirao fo 6 tyop( in eht atucal h)atrc. nI olPuniotpa B di(d nto krind )lmik heert was na dsdo raoti fo 6. Since eth odsd sraoit are ton 1, ew nac ocneucld ttah teh ieoskoc veah an ceffet gerssleard fo teh uanoplpoti (ei kdrna mlki eeoppl sruevs tdndi' ridkn limk e)pp.oel

Sdenoc ch:atr ewN set fo ilpounptoas ot stet for eth fcteef fo mk.li In noituPloap C ea(t cseoio)k etreh saw na odsd triao of 1. nI pitlPunooa D i(dd nto aet os)ckeio rteeh swa lsao na ddos oairt of 1. sihT eansm ahtt kmil idd ont aevh na tecfef rvee adn in'tdd tnoeiubtcr ot eht s.aeedsi

Oyl"n sokeioc ear dptneendleiyn aitaoscsed wiht .E cloi "eacss measn htat olny eth ocoseki aecus het sdeeasi thtiowu het etcsfef fo oiesthgmn les.e

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 +7  upvote downvote
submitted by pg32(218)
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heT aftc htat het sddo rtaio ni the opt flte si rcteroicn maeks tsih enisutqo vrey dliftc.iuf It kames ti rapeap as if eth oeokcsi era astcvaiue btu teh ilkm dha smeo eteicpovrt tfcrao. oS uooixsbn.o

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drpatinoire  odG I ghotthu yaloltt teh mesa way as ouy d.id I edtars at hsit utsqioen rfo ta altes m5in dan kdase lemsyf tas'wh wngro wthi my tstctias.is +1


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 +7  upvote downvote
submitted by youssefa(162)
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lIliyitna ikml ngdrinki wsa aitoecadss htwi ic.oEl tkeuobar hiwt =R9.3O adn ;l1.00t0P& a.(inSfi.gn.)tci fAert asofiianttrcit ntio ate sokocei nad did otn tea okscioe RO eambec 1 ensiadt of .93 nimenag teh asoiotncais diearpaespd. roh,efTeer ietnga eosoikc wsa a ufreoconnd adn trehe is on lare ioonicstsaa bewntee nirkndig limk dan lsii.,.nd.cateE..o lmsik' (the eodr)cnnfou ubniitorncot was ioperbsesln ofr eht RO fo 39. ni eht rifts le.cpa Tsih wsa ufheerdtr tondedtmeras with RO fo 6 in het okseoic anloe pgo.ur

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 +1  upvote downvote
submitted by sattanki(82)
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ihsT oen eerht ewre oufr sodd sr,atoi neo vipodder nrude ahce a.lbte hTe olyn one ttha hda an dods ritao retegra htna .01 was eht beatl in hte tpo htgir (dOsd oaiRt = 6, I ,le)ebevi ihhwc nwhe uyo odleok ta eth b,leals edl ot eth hrgit r.ewnsa

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submitted by famylife(110)
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n"A dsdo oaitr of 1 etsnidcai atth eht cdootinin ro eenvt ndreu ydtus si leayqul eliylk to ccrou ni obht urpgo.s An dsdo taori rgtraee htan 1 sdatnicie ttha het coidniont or evnet si moer kieyll to uocrc ni eth irstf guop.r" (/O/kodwditinkiti/t.rewsdi/ppeiog:ar.a_sh)

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submitted by xw1984(8)
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ehT OR in het pepru eflt 22 ltaeb si otcneicr,r ihwhc hudlso be 6 (276*/623 =),6 nto .1 shTi eansm het RO of eat" okiso"ce deos ton ngheca rtfea itntoarasiftic by adkn"r "k,mli so ndar"k ml"ki si ont a nurfnooce,d nad ae"t "skoiceo si pinnteldyneed asos w/ CEHE oktau.rbe

On eht eohtr h,nda RO ofr nra"dk kml"i cadngeh a lot o(rmf .39 ot 1).,0 whchi caentsidi dn"rka li"km mghit be a norfeducno n,da oh,efreret si otn nleindypenedt sosa w/ cEEH .ukrobtae

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 +0  upvote downvote
submitted by an_improved_me(91)
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A eistuqon i erom nllrgeyae eahv s.i..

sI ti loipesbs hatt wneh uyo fratysti hte a,dat e.(i. minpacogr the ecfeft atth tganei iokseoc ha,s ni epploe ohw kndri limk ro polepe who do tno rndki )kmil taht eht osdd iarto iwll whos ngniciiafsec fro eno tbu not hte ?threo

Sadi rnftyel,fied ni teh aleexpm eav,bo loduc niegta oikosec in eeoplp hwo ndirk kmli aedl to a itfniignsac sniercae teh skri of i,tcnfoine utb nto ni poeple owh woh id'tnd kndri limk?

'vIe kldooe odrnau in isht otmemnc ,htdera dna veha nsee pelope tnnmioe hte tmre "eftefc tn;miiic"foado is hatt awht ym amepxle aebvo owudl wsoh?

nI oterh wrd,so fi inateg sicooke + ngkirnid likm aslde to a icsiifgtnna riks, btu egatni okiseco + ton inrdngik lkmi ash on asdtaecios riks, dowlu ahtt nmae that hte mlik sha na "eefcft idmcfntioaoi" on eth kisr of ntggeti ifenioctn ni opeepl woh ate ?oociesk

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submitted by unknown001(9)
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isth is a uonsb tqeo.insu

hnwe sodd rotia si ,1 mneiagn on onasasicto,i

dsdo gtotai&;r ,1 chhiw in hsti itounqes is 6, samne soniiocatas

eewhr is sodd iarot ? a) ta het tea dkndioo-coeit knrdi lkmi unm.clo ehecn the ,ewarns only eokioc ndeepldyntine .ssa thiw e clio

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submitted by tyrionwill(22)
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we cna keam tnighs pmlise ilek hsti w afiy: ew twna to knwo weehthr X1ro, 2X ertescarol ,Y ew utsj yapatelrse tste 1X dan ,Y adn X2 nad Y icrny.alogdc neh W etts X1 thwi Y, ew eeriqru on X2 oxsreepu; Whn e etst 2X htiw ,Y we rieeqru on X1 uorpxsee;

We tste cokeoi ithw iradrhe,a wnhe mikl aws tno drknu pto( irh:t)g oipstevi e W estt klmi htwi r,ardhiea enwh no cookei was teane owelr( r:)thig anitgvee

in:nuooclsc lony oceiok otscearlre ot het aaiderhr

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submitted by lilmonkey(63)
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heT wkydreo si aoDtdE")E(iN"NsaDLTePYcNsI.E ichWh ni unmah analgueg measn NT"O I"COTASD.SEA

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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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