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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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tsih eniosutq mkeas me watn to eta an e lico oeikoc dan opeh i eledb tuo

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caitlyncloy  icpk C dna eovm on wsa ym resatygt P: ehpl lol +2
thegooddoctor2  llo godo noe +1
sparta  LOL kthna uyo rfo hsti mnmetoc +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi on one coenti taht eth Odds roati no eth tpo tfel is o?nrgw Am I snsigmi mnithges?o If you uaaccltle ,ti i'st 6 ujts eikl eth tpo ihrtg ..oe..n

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mjmejora  atsth tyaalluc llreay nynuf +
yex  eBaesuc I adis ,os psipeal .hr.ee. :/- +1
doodimoodi  Cnat ebeleiv we ayp $06 rof stih parc +50
aisel1787  sebt motnmec oooomddii)d +1
b1ackcoffee  atth kfucnig wtrhe em ffo on .meax I swa liek is hteer na ceeftf iotnaimiodfc by "Not diignnkr kml".i the cf!ku +2


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 +8  upvote downvote
submitted by sne(59)
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RO g&;t1 iictnseda adesrcein ceecnrcoru fo e.vten Teh nylo OR rgeeatr nhat 1 aws ni teh etlab htta dicaeintd ttah teh eubcjts eat iokesoc utb tdi'dn nridk mik.l hsuT, ttah si teh nylo eno itwh a tfngniisaci eoncrcucer

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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 eppelo ohw rnlaleyeg dah uelbotr giaenrd eth wto ar:thsc

tFisr :rhtac We aestpdrae eht reniet inooultppa into tow lsramel splnpauoiot ot tets fro hte osikcoe .ftacef In anPupoolti A akrdn( kl)mi rhete asw an osdd iarto of 6 o(pyt ni eht ltauca .h)actr In ouiPanptlo B dd(i otn dinrk )lmik erhet was na sddo traoi of .6 eiSnc the dsdo oastir era nto 1, ew nac ecdocnlu hatt het ockosei aehv an ffetec rgerlessda fo teh aliputoopn e(i randk kmil pepelo survse tdni'd diknr mlki oepe.pl)

condeS hctra: Nwe set fo ppoiuotasnl ot tets orf the fetcfe of mkil. nI ploaPtniuo C t(ae iesokc)o terhe asw an sdod orati of .1 In unPilotapo D d(di otn tea kosocei) heetr was osal an odds roati of 1. iTsh masen atht lmki ddi not vahe an ecfeft vere nda dnt'di tecnbirotu to eth .adssiee

nly"O oiecoks aer eildpntnyndee dtesiacsoa hwti E. olic "secsa msean tath lnyo het kosioce uacse eth sdeisae twohuit het cffeest fo sehngoimt sle.e

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 +7  upvote downvote
submitted by pg32(218)
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eTh tcfa that the dosd artio in het pot tlef si corrteinc ksema ihst nsiqtueo yevr cu.filfdit tI amkes it eappar as fi the ooeisck era aecistvua tbu teh imkl hda mose eeirtotvpc ortc.af oS booxsniou.

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drpatinoire  doG I guththo olltayt het same way as uyo idd. I dstare ta isht ueniqost ofr at ltase min5 nad asdke mselyf waths' rwgon iwht ym t.assisitct +1


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 +7  upvote downvote
submitted by youssefa(162)
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lIytnlaii iklm ngiikdnr saw cstdaaieos twhi .lEcio rukbaeot iwht O9R.=3 dna ;0&0l.t10P tcni.ifnag..)S(i Areft statirfotciina ntio ate isecoko dan did not ate koscoie OR cmeaeb 1 sntaied of .39 aeinmgn hte iassnoticoa pa.deridasep o,fheeTerr iaegtn kcseooi saw a udcefoonrn dan eethr is on ealr cotanissaio bnetewe ndgiikrn klmi adn l.Edat..cs..i,ioen mlski' (teh unofenc)odr tnobciniutor swa leisrnsbepo orf teh OR fo .39 in hte tfisr ecpa.l Tihs saw feuretdrh manostrdeted twhi RO fo 6 in eht coikose leona ug.rop

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 +1  upvote downvote
submitted by sattanki(82)
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sihT neo heert erwe oufr osdd iao,rst one reodipvd drnue chae atlb.e Teh noly noe ttha dah an odsd torai atreegr htna 01. swa the ltabe ni teh pto rhtig (dsdO aoRti = 6, I l,)ieeevb wchhi when uoy doolek ta the eblsal, del to eht thirg n.ewsar

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 +1  upvote downvote
submitted by famylife(110)
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"An sdod roita fo 1 caisinetd htta eth incondoit or eevnt urned dysut si yelluaq lielyk ot ocucr ni othb ogrusp. nA ddos oaitr retagre ahnt 1 cteanidsi ttah hte cindionto or neetv si rmeo eylikl to ouccr ni teh irfst gu"op.r (kowor//sisie.g_adheprtkdpwiai:t/Ot.din/i)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe RO in the eprpu ltef 22 belat is icreontrc, ihwch sldohu eb 6 27(62*63/ =6,) ton 1. hTsi mnaes eht OR of "aet "oosecik eosd not nhcega eafrt ioaintcttasfir yb arndk" "li,mk os rn"adk ikml" si ton a reucno,fdon dan "aet c"ksoeoi is tyineeddnlepn aoss /w EECH ketoru.ba

On eth trheo n,dha RO ofr knrda" mi"kl dhnacge a lot orfm( .93 to 0).,1 hwhic idnctiaes krnda" k"mil mhtig eb a foeounnrcd nd,a ee,erotrhf si nto enineneydtdlp ssoa w/ EEcH otebk.ura

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 +0  upvote downvote
submitted by an_improved_me(91)
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A niuotqes i mero ygeealrln ehav .i..s

Is ti psseiblo atht ewnh oyu tysftrai het ta,da e.i.( gmaoipcrn eth cefetf ahtt engait siokceo hsa, in eoplpe ohw dkrni likm ro lpoepe ohw do nto dkirn mk)il ttah the osdd oatri lwli hwso niicacgfsien ofr eon btu ont het ?torhe

idSa ietfnl,rdeyf in eht peemaxl bev,oa cdluo intgea skiooec ni pleoep hwo knidr likm dlae to a aincitngfis ensiacer the rksi of inocefit,n tub otn ni leeppo who woh i'dntd nikrd ki?ml

I've oekold nduaor ni itsh emcontm t,erdha and hvea eens poelep nntoiem eth term eteff"c madi"cofit;nio is thta awht my xmepale veabo wuldo s?owh

nI hetro owdr,s fi entagi kcoeiso + igkndinr ikml lesda ot a tscgiinnafi k,sir tbu gtneia oeskoic + not nnkridig mikl has no oiatacsdes isr,k wodul that mena atht eth klim hsa na te"effc i"inoatmdfico no the rksi fo iggntte ncitniofe in pepelo owh tea c?oseoki

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 +0  upvote downvote
submitted by unknown001(9)
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isht si a nbuso senuqit.o

enhw ddso iarto is 1, ngmenia no tcsa,soainoi

ddos to&gir;at 1, hwhic in this noqisuet is 6, manes sisonaatoic

ewerh si sddo otria ? )a at eth eat odktii-ocndoe knrdi likm n.luocm neehc het anes,wr nloy oeciok ndetnnydeelip sas. whti e cloi

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 +0  upvote downvote
submitted by tyrionwill(22)
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we can aekm snitgh ipemls klei this f :aywi we ntwa ot konw erehwht Xo,1r X2 olerrceast ,Y we jsut ptyeeslraa ttes X1 and ,Y adn 2X and Y lcyodrg.naic h nWe estt 1X twhi ,Y we qeirure on X2 ;xesroupe n heW etts 2X thwi ,Y we eqeirru on 1X sp;xreoue

eW ttes eikoco twih diaerha,r ehnw likm aws not dukrn ot(p hg:i)rt tpoeisvi e W estt lmki htiw earahid,r wnhe no oecoik aws eante wlreo( ):rtigh etvneiga

ncuilsn:oco yonl iokcoe restcorlae to het rrhiaeda

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 -5  upvote downvote
submitted by lilmonkey(63)
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heT owrdkey si .tEdaYDEEo"TNiP"(aecNDNsLsI) chWih ni unamh luangage nmesa NOT" A"ECSSTAD.OI

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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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