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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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tihs qtoisnue eskam me tanw ot tae na e iclo oiceko dan ohep i deelb uto

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caitlyncloy  pcki C and mevo on aws my ytgsrtae P: lhpe oll +2
thegooddoctor2  llo dogo oen +1
sparta  OLL ktnha uyo fro ihts etcomnm +



 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi on eno eitnoc atht the dsdO irato on eth opt tlfe is rogn?w mA I smnisig egmn?ithso If uyo ctlceaalu it, sti' 6 jsut lkie hte pto hrgit ..n.oe.

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mjmejora  httsa yatllauc elryal nfnuy +
yex  escBuea I sida ,so plaspei ..r.ehe -/: +1
doodimoodi  natC eeilveb ew apy $60 ofr htis arcp +50
aisel1787  sbte tnmocme ido)ooddmoi +1
b1ackcoffee  taht ufckgin rtehw em ffo no eax.m I swa ekli si rhtee na fcefet nimfidoiotca by to"N giinrndk li.k"m teh !ckfu +2



 +8  upvote downvote
submitted by sne(59)
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OR t&1;g diceintsa neidserca orunreccec of tn.eev eTh onyl RO egartre nhta 1 swa in het btale taht teidnidca htta het uectbjs tae ceiosko tub idn'td dkrni li.mk ,hsTu taht si the nylo oen htiw a ingfsaicitn coerecrnuc

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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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rFo lpeope ohw alreynelg dha ulrebto rangide the otw as:thrc

itFrs h:crat eW taeradsep eht eitren tnaoluiopp oitn wto lresmal otspnlipoua to tste rfo teh kciosoe .eaftfc In ilPoupaotn A krad(n )imlk rethe wsa an ddos tirao of 6 oytp( in eth uaaclt .hatc)r nI ulaptPnioo B i(dd ont nikdr )kilm heert was an sdod raoti fo .6 Seinc teh sddo arsiot aer ont 1, we nca unecldoc atth eht ikoecso aehv na etfcef eglasdrres fo eht anlippoout i(e adkrn kmli opeepl vesurs nidd't nikdr likm .oelpe)p

eSncdo rac:th ewN tse fo paptlouisno ot sett orf het ftfcee of kilm. nI iaPntopluo C tae( eoskoi)c hrete saw an sdod itaor fo 1. nI oiatpPonlu D d(id ton tea oc)eioks terhe was lsao na dsdo ritao fo 1. Tish amsne htta mlki ddi otn vaeh na ffetce vree adn nd'dti tcbutroeni to eth eaeds.si

"ynlO ikooces rea netynnldieepd dsoasaitec wthi E. iocl seca"s emnsa ttah lnoy teh seikoco ceuas het eiadses iouhttw eht fsefect of itsemonhg ees.l

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 +7  upvote downvote
submitted by pg32(218)
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heT tfac taht hte dsdo itroa ni teh tpo eftl si rerictocn amsek ihts nouieqts eyvr litff.cidu tI ksaem it pparea as if eht ikocsoe aer cuvaaiest btu eth imlk ahd soem vorittcpee .fctoar oS ob.oosxuin

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drpatinoire  Gdo I uhgttoh tlyolat eht ames wya as oyu di.d I rstdea at sthi tiuqneos orf ta etals in5m nad kaesd emyfsl wth'sa grnwo hitw ym stc.assttii +1



 +7  upvote downvote
submitted by youssefa(162)
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ilianytlI mikl krigdnin wsa atieacdsso thwi icEl.o roukeatb twhi =.RO93 dna 000;.l&1tP .ntiig(.)na.ifSc tfAre oftiisitaancrt inot eat socoeki dan ddi tno eta oesocik OR aecbem 1 ideastn of 93. gmnnaie the ancssiotaoi daedips.apre oTehfrree, tgenai sooiekc aws a noueodcfrn nad rteeh is no lrea sitoioansca eetnewb ininrdkg imkl nad den..oii.Etcl.s,a. km'ils (eth r)foeducnno ocinuobitntr wsa rlbposniese rof the OR fo 39. in the rtsfi c.pela hTsi wsa ethdefrur mtsdrnatodee ihwt OR fo 6 in eht iookces eaoln og.upr

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 +1  upvote downvote
submitted by sattanki(82)
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Thsi eno etehr erew uorf odsd ,rtoais eno dveiorpd ndrue haec ebt.la Teh olyn neo atth had na dsdo otari egtarre athn 0.1 wsa eth alteb in eth pto hitrg (dsOd iatoR = 6, I ivbe,e)le chhiw nehw uoy leokod at hte e,labsl eld ot het trhig nse.rwa

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 +1  upvote downvote
submitted by famylife(110)
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A"n ddos ortia fo 1 tnsceidia taht het tciiondno or vteen eurnd yutsd is euyalql lylkie ot cocru ni othb sogp.ur An odsd iorta taerger anht 1 isaicnetd hatt teh niotiondc or evtne si mroe yilelk ot uocrc ni het frtsi orgp."u (/Odh_dt/eiwdnpgrosatwprokis.iai:kie/i/t.)

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 +1  upvote downvote
submitted by xw1984(8)
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heT RO ni the pruep lfte 22 abtel si ecnoct,rir hchiw dhuols eb 6 2(76/*623 6,=) ton 1. hisT amens hte OR fo "aet isecok"o dseo ont nghcae efart otiasrfnitatic yb ankdr" li",mk os rakn"d m"kil is ont a nrofoneucd, adn "eta ocsekio" si lnnienpdetdye sosa /w EHEC tka.rbeou

On teh ohrte ha,nd OR orf rnd"ka kil"m ndghace a otl rfo(m 39. ot 1,0.) hwihc aiscnetid rdk"na mk"il ithgm eb a ocdnfruoen nad, fer,rtohee si ton eynnlinddetpe asos w/ EcHE eabrto.ku

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 +0  upvote downvote
submitted by an_improved_me(91)
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A qiuotsne i omer laynlrgee heva i..s.

Is ti bieoslps taht henw oyu sarfitty het ,data ..(ei cmiagpron teh fteefc that nietga seokoic ,has ni ppeole owh dkirn imkl or polepe how do otn indrk m)lik htat teh sddo rtiao lliw hwso aciginfecisn ofr eno but ont the t?hoer

diaS drinlf,fteey ni the lpxeaem ,vaeob codul egatni ioeocsk in pleoep woh rnkdi imlk aled ot a iafnscigtni cersinae the skir fo nno,eitcif ubt ont in ppoele owh woh 'dtind kirdn klmi?

I've ooedkl raduno ni sith tmcnmeo thdrea, adn ahev esen ploeep omniten eht retm fe"tcfe ci"timd;iooafn is hatt hwta my plmaxee vobae lduow hwos?

nI thoer sd,wor if aginte oocesik + nrdigink lkim salde ot a fcignnasiit i,krs ubt engita osckeoi + ton nidknirg kilm ahs on oseicastda irsk, uldow ttha eamn that the lmik ahs na ceefft" fcitoamdniio" no het rsik fo egntigt finteionc in oeppel ohw eat ekoosc?i

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 +0  upvote downvote
submitted by unknown001(9)
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shit is a unsob .tuqinose

ehnw osdd taior si 1, enanmgi on ciosoasti,na

osdd >ri;oat ,1 chhiw in tshi inuqteso is 6, ensam sioanistaoc

erhwe is ddso rtoia ? a) ta het tae e-oinddcokito krdni milk lonm.uc nceeh het ne,wsar lyon oekoci nnnitdelpyeed .sas ihwt e loic

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew nca maek sihngt msiple kile hsti fai: wy we tawn to wonk rewheht X1,or X2 lrtoaeesrc ,Y we usjt arpelsteay test 1X and ,Y nda 2X nda Y ygiconr.ldca h eWn ttse 1X whti ,Y ew urereqi on X2 eer;pxuso ehnW tets X2 htiw Y, we iqreure no 1X ;preuxeso

eW etts ikoeoc thiw eaaidr,rh ehwn lmik swa otn ukdrn (otp grti)h: epistivo W e test ilkm tihw rei,ahrad newh on coioek wsa antee w(eolr rth:gi) ientvaeg

:ocnlciuson ylno koioce tarercsloe to het ahrdreai

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 -5  upvote downvote
submitted by lilmonkey(63)
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Teh dwykero si ToY(D)"daELE"aN.sscNNEeItDiP cWhhi ni aumhn egagluna emans NOT" AAOD"ETI.CSS

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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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