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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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htsi tuqieson askme em antw ot tea an e lioc ockioe and oeph i elbed out

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caitlyncloy  pikc C dna eomv on saw my ratytgse P: elph oll +2
thegooddoctor2  oll dgoo eon +1
sparta  OLL htnak yuo for this tncmemo +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi on noe oneict tath hte Osdd airto on teh pot lfte is ow?nrg Am I nsiimsg ?tseinhgom If oyu allcateuc it, s'ti 6 sjut lkei the opt rtihg .eo...n

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mjmejora  hatst tylaluac arlyel nyfnu +
yex  eeacsBu I dsia ,so peiapls r.he.e. -:/ +1
doodimoodi  aCtn eveelbi we pya $60 orf sith apcr +50
aisel1787  best omtcnme )iidodomdoo +1
b1ackcoffee  atth kniucgf twher me fof on amx.e I wsa lkei is heetr na tefefc inimaoodctfi by t"No dkngirni .klm"i the k!fcu +2


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 +8  upvote downvote
submitted by sne(59)
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OR 1t&;g inesdcait aisrcende rnoeucrecc of tnev.e heT lyon OR rtergea tnha 1 wsa ni het altbe atth dniitedac ttah teh tbucesj ate sookice ubt 'tddni ikdnr li.km hu,sT atth is the yoln one ithw a iafgnisintc cceenurorc

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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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oFr lpoepe who aenygrlel had eltoubr ndagier eth wto :rsthac

striF h:rcat eW pdstreeaa het retein lonptpioua ntio two alelsmr toulippoasn to sett fro eht eokicso eft.cfa In nopoPatiul A ankd(r )kiml etehr asw na dosd oarti of 6 t(yop ni hte acuatl crtah.) nI aiptlPouon B d(id ont rinkd i)lmk ereth saw na dsod tiaor fo 6. iSnce hte dods otisra ear ton ,1 we nca neocudlc ahtt het ciesook veha an etceff rdaslesrge of hte pnulotiapo (ei rknda klim peploe ursvse i'dtnd indrk lmki opp.e)le

Scedno cahtr: ewN ets fo niopsauotpl ot stte orf hte teecff of .lmki In oPoiuptlna C eta( k)icosoe eetrh was an dsod tiroa of .1 In Ppnouiloat D i(dd not aet sioc)oek reeth wsa losa an dsdo rtiao fo .1 hsiT saemn tath lkim ddi ont veah na ftfeec veer and i'dndt onbtirutec ot the edisea.s

lOn"y ocseoik rae dpnyntedneile tsacoiedsa iwht .E coli es"cas smena taht ylno teh oksoeci sucae eht seesdai utiowth het eeftscf fo oingmshte ee.ls

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 +7  upvote downvote
submitted by pg32(218)
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eTh ctfa that eht odsd iotar ni hte opt elft is triecrcon aekms shit qneoitsu rvye cudlffii.t It eksma ti eparap as fi eth oscioke ear aaicsveut tbu eth kiml had emos eotievpctr .ftaorc So ooxnou.ibs

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drpatinoire  oGd I hotghtu aotlytl eth easm awy sa ouy .ddi I drstea at tshi ntuosqie ofr ta laest nmi5 nad esdka fylmes hatws' gwnro whit my itssicast.t +1


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 +7  upvote downvote
submitted by youssefa(162)
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ilyitnlIa mikl nkdgiirn asw acdsateios ihtw iElc.o eabkoutr wthi O=9.3R and &;10P.l0t0 nitS.f)ginc..(ai Aetfr tacfisiatnroit nito eat seociok dna ddi otn eat skeoioc OR amcebe 1 ntiades of .39 gemnnia teh aosncostiai dpespear.aid eoh,feTerr itaneg eiooskc asw a norufendoc adn terhe si on lera tsiaaonicso bwtenee rigkdnni lkim nda .Escaolni..,di..et likms' t(he ceonud)rnfo uobnrtniocti was relsnpisoeb ofr teh OR fo 9.3 ni hte tfsir pc.lea This saw rrtfduehe satmtrdeeond whit RO of 6 ni het ooiksec enlao ugp.or

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 +1  upvote downvote
submitted by sattanki(82)
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hTis neo teerh erew fuor dods ,otirsa noe pdvireod enrud ceah elta.b The nloy eon htat hda na odsd tioar tarereg athn 0.1 was the ealtb ni eth top gtrhi (sOdd oRati = 6, I iel,ev)be whcih nhew ouy doleko ta teh llabse, led to eth tigrh nea.wrs

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submitted by famylife(110)
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A"n odsd orita fo 1 intcsaied htat the inioontdc ro teven rdneu dtsuy is aluylqe ylkiel ot cruco in hotb g.suorp nA ddos iarot retarge ahnt 1 tscanidei htat eth dnitocnio or evten is orme illyke ot ccuro in hte rtisf "g.urop (/a/tdnighi:swd/prtrdkpeOisieaw.o_/.itiko)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh RO ni eht uprpe ftel 22 aeblt si rnitocrec, wcihh ldshou be 6 (273*6/26 =)6, otn 1. iTsh nmaes het OR fo "tea okceo"is odes ton hgacne tarfe ftoairctaintsi yb dkarn" ,milk" so dnkra" i"lkm is nto a ronu,dneofc nda "aet ocs"okie is nenlpndteydie osas /w CEHE .erbotuka

On teh ehort dh,na RO orf "knrad "kiml agehncd a tol mf(or 3.9 ot .1,0) hhwci sadniceit knrad" ki"ml hgmit be a onnudrocef ,and trfohee,er si ton pdnlyeetndine soas /w EHEc tabruko.e

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 +0  upvote downvote
submitted by an_improved_me(91)
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A niqeusto i remo neyrleagl heva si...

sI it oespblis ahtt hwne uoy srtfayti teh ata,d .i(.e aprcgnomi teh ftecef thta netiag sokeioc ah,s in eoeplp hwo drkni klmi ro popele owh do tno dnrik il)km atht eth dsod iaort liwl hsow inisicfcgnea rfo noe ubt otn eht ?rheto

idSa ftileynfrde, ni het alpemex vea,bo ocudl gtnaei ikosceo in pepoel woh rkidn kmli aeld to a nnigifiacst seeinrac the skri of fcoetin,ni tub ton ni pepole hwo woh nit'dd rdkni lk?im

'vIe odelok nrudao ni ihst cnmmteo htdrea, dan aehv eens eoelpp ntieonm the emrt ceft"ef mcfoaoi"ndi;ti si hatt ahtw ym apxmele bovae udowl w?hos

In eroht or,dws fi tianeg kicsoeo + dnniirgk lkim sdlea to a actinifgsni rkis, btu nteiga skcooie + nto dgkirinn lkim hsa no sidaascote isrk, luwod ahtt aenm that teh klmi ash na f"efect itndoiifomca" on the rski fo ntgietg ioictnfen in ppleeo hwo tea k?sceoio

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 +0  upvote downvote
submitted by unknown001(9)
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shit si a nbuos i.otqeusn

ewhn sodd atoir is ,1 gnmneia on tssainco,aoi

odds ;gtorta&i 1, ihhwc in htsi enquotsi is 6, nmesa iassntiaoco

rhewe is osdd trioa ? a) ta het eta tdndoocioe-ki nridk imkl l.ncoum ehecn teh s,enwra ynlo kiecoo dnienyndetlep sas. htiw e coli

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew nac keam shgitn ilpesm elki htis a:ywf i ew anwt to nokw hhteerw Xr1,o X2 esecaorlrt ,Y we stju pltsyaerae ttes X1 nda ,Y adn 2X adn Y dlcygo.carni eWh n stte 1X hitw ,Y we urreieq on X2 re;sepxuo hnWe ttse X2 hiwt Y, we eerirqu no 1X ;seoexrpu

eW estt eooikc ithw r,riaedah enhw lmik wsa not nukdr to(p ihr)tg: soitivep eW stet klmi tihw eahad,irr nwhe no ioekco was netae ler(wo trhgi:) igventea

snicou:onlc lyon ockoei tcreelsaro to eth reiahrad

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh rodeywk is DsaLNa"cNYotNIi)(eEEsTE.d"PD ciWhh in ahnum gneaaugl eamns NTO" "I.TOASEDCSA

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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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