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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 noetusqi emsak me tawn ot tea an e cilo ekcioo dan peho i belde uto

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caitlyncloy  ckip C dan mvoe on saw my egsratty :P hple lol +2
thegooddoctor2  llo godo noe +1
sparta  LLO thnak yuo ofr isht ntommec +



 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi no one ceinto atth eth dOds itrao no eht top flte si rwnog? mA I sgimnis geishontm? If uyo ltucaclae ,it st'i 6 stju keli het tpo tihgr n..e.o.

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mjmejora  hstta yatalluc rlelay fnuyn +
yex  ausceeB I dsai ,os aepilsp re.e..h -:/ +1
doodimoodi  Catn beeveli ew apy 6$0 orf tihs prac +50
aisel1787  bets mntoecm o)ioddmdoio +1
b1ackcoffee  taht kfnicug twher em ffo no e.mxa I swa iekl is hrtee na tfeefc iocminftdiao by "tNo nrkidgni .ilkm" eth c!ufk +2



 +8  upvote downvote
submitted by sne(59)
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OR >1 cistdanie eceraisnd crnoeceruc fo vn.ete ehT oynl RO ergtear atnh 1 was in het balte ahtt iiedndatc ahtt eth betcsuj ate skoicoe utb d'tind rknid mil.k shT,u taht si the yonl eno whti a naiicstgfin nrccuceero

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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)


 +8  upvote downvote
submitted by qiss(20)
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roF eppoel owh lgaelyern had olertbu negirad eth two ahr:sct

itrsF ath:cr eW adtseaerp het ernite pntpailoou oitn otw alrlsme natpilpuoso ot estt orf the eskiooc taf.cef In autonolpiP A (nkdar kml)i hrete swa an dsdo iatro of 6 o(ypt ni teh caatlu a.rt)ch In Ponpltoaiu B i(dd tno irkdn lkmi) rtehe asw an dosd taior fo .6 Sceni eht dsod triaso rae ton ,1 we acn dcoecnul ahtt hte osoikec have na fcteef edregasrls of hte toiuaolpnp i(e kardn likm ppoeel srseuv ni'ddt kridn kilm poel.)pe

neocdS hc:art wNe tes fo ulotapoispn to tset fro teh ecetff of klm.i In pPolaunito C ae(t eksocoi) ether saw an dsod rioat of .1 In oPutpoanil D di(d nto aet oek)scoi erhte wsa oasl an dosd troia fo .1 isTh snema atht ilmk ddi nto have an fcfeet rvee adn 'ntddi nuocetbtir ot het ess.edia

l"Ony keoicos rea eediytnneplnd tcdsasoeai whit E. ilco se"acs saemn htta ylno het siockoe usace eht iesased httouiw the sfctfee fo higtnomse .lese

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 +7  upvote downvote
submitted by pg32(218)
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The ftac ahtt het dsdo otari in het tpo tfel si ciorctnre eskma tsih ouiqtnes vyre dficit.ufl tI sekma ti epaapr sa fi eht soceiko rae vaausteci btu eht milk hda oesm veotietcpr rocaf.t So .xiouobsno

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drpatinoire  doG I uohgtth ltyatlo teh seam ayw sa yuo d.di I aedrts ta itsh nusiteqo ofr ta laest nim5 adn kades mysfle 'thaws rwnog ihtw ym isttc.atiss +1



 +7  upvote downvote
submitted by youssefa(162)
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anlliyIit kmli ikgndnir saw asstocdiea with iEl.co arobkteu wiht R3=O.9 adn l10.&00;Pt Sitciaf.(gi.n.n) Afetr otniaafiirtcst onti tea keoisoc nad ddi not ate eksooci RO bcemae 1 eatnids fo 9.3 nineagm het oaitcaoinss pdiepasdrea. eorehf,erT inetga ekocois asw a enurocfdno dan theer si on real isosnctoaai etbnewe gnirkind lmki and ci.o..ni,tEe.dsl.a ilk'sm (the ednrunoo)cf icurtbionnot aws lpeebnsorsi rfo eht OR fo 39. in teh rsitf ca.ple hTsi wsa drterfehu mdteetadnosr wiht OR of 6 ni het okesoci oanel pog.ru

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 +1  upvote downvote
submitted by sattanki(82)
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This oen reeht erew ufor dods i,oarts noe idropvde erdnu hcea l.ebta ehT noyl eno htat had an odds riota aregetr hnat .01 wsa hte taleb ni het pto thgri (ddsO toaRi = 6, I eeb),live hhwci hewn uoy elokod at eht alleb,s led ot het grtih snaewr.

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 +1  upvote downvote
submitted by famylife(110)
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A"n dods itroa of 1 tandsieic ttha the otnndiico ro veten rnude yutds is laqeyul lyekil to cucor in tohb ugsopr. An dsdo atroi agteerr hnat 1 ticsdiena atht the noicnoitd or vteen is eorm lylkei to uorcc ni teh ftris rugop." (.:ewai/id//gipeokrp.siOis/_hiwkdttdtnora)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe OR in teh puerp tfle 22 elbat si ,etonrcric hchiw odushl be 6 (2726/*36 =6), tno .1 sThi msnea eht OR fo tea" osci"oek eods otn anhegc taerf anatttsfirioic by rknad" kl,m"i so "nakrd kilm" si not a n,doconeufr dan a"et iooekc"s is enyieteldnndp asso w/ ECHE .ukroteba

On het rtheo ,nahd RO for kr"dna k"ilm adeghcn a tol frmo( 93. to ,)1.0 which sdicantei akrd"n ki"ml thgim eb a nedrcofonu ad,n h,reforeet si not nidnpelenytde ssao w/ EEcH arkoebt.u

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 +0  upvote downvote
submitted by an_improved_me(91)
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A uotieqsn i mroe ayenlergl veha i.s..

Is it bsoselip thta ewhn you ftryasti teh adat, e(i.. aipcmngor hte cffete taht etiagn kosocei h,sa in peelpo hwo dnkri mlik or eeppol owh od ton krdin ml)ik ttha eth dsdo oairt liwl whos fiisgncincae rof noe tbu otn eht ?reoth

Sadi dfl,erneyift ni eht exaempl ve,oab doluc geinta iekosco ni eoelpp woh rndik iklm leda ot a aiscntfigni aerceins the iksr fo o,nifntice but not ni oleepp hwo hwo itn'dd drnik l?mki

eIv' ookeld drunoa ni tihs ommntec heatd,r dan vahe eens loeepp tonenim teh rmte ceftfe" oafi;t"nicdomi is ttha wath my elmxaep obave ldowu ohw?s

In oreth wr,ods if etngia keiosco + ninidkrg iklm asdle ot a iacsiignftn ris,k btu atineg ciskooe + not rigdiknn klmi hsa on iscadoteas riks, luwod atth anem tath eht mlki hsa an efetfc" "itaficdionmo on het ikrs fo eittggn nifiotnec ni peolep how eta ?oiskeco

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 +0  upvote downvote
submitted by unknown001(9)
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sith is a nubso qo.tnieus

wehn dosd iorat si 1, igannem no acntssooi,ai

sdod g&oit;rat ,1 whhic in sith tiosnuqe is 6, senam aatnocsiiso

ewehr is osdd rotia ? )a at hte aet ciikento-dodo irknd mkil on.mucl hceen het w,rsane loyn cekioo edyepdnintnle ssa. with e ocil

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew nac kame htgisn pimsel lkei isht wi:fya ew anwt to wokn hhterew o,1rX 2X ceolsrerta ,Y we just raetseaypl tset 1X dan ,Y adn 2X adn Y ylidccrona.g en Wh tste X1 twih ,Y ew reuerqi on 2X expe;uors enW h stet X2 thiw Y, we uqreire on 1X p;roesxue

We tets oceoik thwi e,dhaarri wneh imkl swa tno dnurk tp(o :gih)rt spitoevi eW sett kilm tiwh da,hreiar whne on eookic aws naeet wreo(l r):tghi tvngaiee

:lcinocuson oynl ioecko otleraersc to teh dhariera

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh ewrdkoy si ET"N.NsD(ELP)a"YadcDioItsENe Wihch ni unahm gelganua aensm OT"N STAOA.IS"DCE

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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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