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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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sthi esnituoq kasme me atwn ot aet an e olci ckeoio nad poeh i edebl otu

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caitlyncloy  pkci C and mevo no asw ym sryattge :P eplh llo +2
thegooddoctor2  llo ogod one +1
sparta  LLO nkath you for ihst econtmm +


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 +15  upvote downvote
submitted by doodimoodi(74)
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idD on neo ioetcn tath eht dsdO tiora no the tpo ftel si g?wron mA I snigsmi is?ohetgnm fI uoy elacltacu it, i'ts 6 jsut eikl het opt trigh .oe.n..

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mjmejora  atsht atuyallc ryaell nnyuf +
yex  escaeBu I adsi so, eiasppl ..hree. :-/ +1
doodimoodi  ntaC leivebe ew apy 06$ ofr hits rcpa +50
aisel1787  tebs etncmom m)idoooiodd +1
b1ackcoffee  ahtt fkunicg thewr em off on xma.e I was elik si heter an eecfft oomadtiiincf yb o"Nt kndnigir .kiml" het k!cuf +2


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 +8  upvote downvote
submitted by sne(59)
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OR ;g1&t ncidseait nsraedcie rcnccoeeru of e.evtn hTe lyon OR eragetr atnh 1 was in teh elbat tath dicneaidt tath the cbjuets aet koeiocs tbu 'nddti idknr ilm.k ,Tuhs ttah is eht olny one htwi a cnstaiiifgn reencoucrc

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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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roF poeelp woh ylegalnre had telobur agdienr the tow sarc:th

rtiFs :hcrat eW esdaprate hte etrnie oltpuionpa niot tow rsmelal tuipnpsooal to ttse rof eth osekoic tffeca. nI uontioplaP A knrad( mlik) treeh wsa an dsdo trioa of 6 pyt(o in the ltcuaa rc)ath. In oaotnPlpui B (did ton dkrin im)kl eehrt was na odsd ratoi fo 6. nScei hte ddso tsiora rae otn ,1 ew acn cluceond atht teh ookiesc aveh an ftceef redeslagrs of eth aountpploi ei( ankdr klmi people rvseus 'ditnd riknd lmki )lo.ppee

oceSnd rah:tc wNe est of ltuipnpaoos ot tste rof eht etffec fo i.lmk nI uipatooPln C e(ta s)icokeo ether aws an dsod aiort of 1. In lutnooiaPp D idd( otn aet osockei) tehre swa olas an dsod atiro of .1 hsiT mnesa that klim did ont aehv na tefcfe veer adn idtdn' otrtbnucei to eht sideesa.

nylO" ooikcse are ndlpeyiendnte icaessodta with E. loic asc"se snmea hatt oynl the ceiokos ueacs het deseias iothtwu the fcefest of tghineosm esle.

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 +7  upvote downvote
submitted by pg32(218)
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Teh tcaf atth eht osdd otari in eht pot ltef si orcientcr amsek ihts otqiusen evry cduitfilf. It kamse it peapra sa if hte scokeoi era eavauisct tbu the mkli hda moes ecpevttori raftc.o oS s.inubooox

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drpatinoire  oGd I ghouhtt tlaloyt the smae yaw as you idd. I rasdte ta isht uqiotnse ofr at atsle mi5n and adkes mleysf a'thws rwngo iwht my aicsstit.ts +1


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 +7  upvote downvote
submitted by youssefa(162)
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lnlaiyIti imkl rndgkiin asw siedaacots htwi i.clEo rkauoteb itwh R9=O.3 nad l00&.;01tP c.ngi.fati.i(S)n retfA rcottfiiaisnta iotn tae eksooic dna ddi ton eat ieskooc RO aceemb 1 dinstae fo .93 miangen eht coisantsoia siaeddarpp.e reTe,oefrh aenigt ocesiok swa a fdonncueor nad ethre si no earl siinacoosta eetnewb ininkdrg kiml nda .i.nt,.di.olsaE.ec m'slki h(te cen)ufornod oinoticubntr saw soepblersin ofr het OR of 9.3 ni hte tsifr ceap.l Tihs was dfeurhter tdodtrneseam iwht OR of 6 in hte kioseoc lnoea ur.pgo

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 +1  upvote downvote
submitted by sattanki(82)
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hTis noe reteh reew urfo sdod asi,ort eno ivprddeo eurdn ceha tale.b ehT ynlo oen ttah hda na odsd rotai gaetrre anth 01. was hte tlbea in the opt ighrt (sOdd otiaR = 6, I ei),vblee hchiw nwhe ouy dkloeo at teh lba,lse edl ot the hgirt snrwa.e

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 +1  upvote downvote
submitted by famylife(110)
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nA" osdd iatro fo 1 ceatdnsii thta hte onioitdnc ro tevne nedur dtsyu si aqyulle yleikl ot ccuor ni htob so.pgru An odds ariot eagerrt ntah 1 ticindase taht eht tindniooc ro vneet si eomr ikelyl ot cuorc in eth fsrti ropg."u (/aogid/oe/_Oiiekkihsrsit/rtwp.wn.tid:pda)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh OR ni hte pperu felt 22 abetl si n,oitecrrc whhci dsouhl be 6 (27626/3* 6=,) nto 1. hsTi neasm hte RO of ea"t coksoe"i dseo otn cgaenh etraf iitastifrocnta by arndk" ,l"kmi os rd"nak "kilm si nto a eforucdnno, nad "eta keicsoo" is nnpdyeieedntl ossa w/ ECEH ktu.roeab

nO teh hroet h,nda RO rof dkn"ar k"iml gndecha a lot m(ofr .39 ot 10,). whchi eniicadts rk"nda mik"l gtimh be a ouonndfecr adn, oef,hreert si not tdedlypineenn osas /w cHEE eko.truba

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 +0  upvote downvote
submitted by an_improved_me(91)
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A nusieoqt i eomr alryleneg vaeh ..s.i

sI ti sbiloeps atht when oyu atistryf the aa,dt .i(e. mconrapig teh effcte htat tneiga sciooke ahs, ni elppoe ohw kidrn iklm or leoppe woh do tno kdnir k)lmi htta eth ddso roati illw shwo fcncesgniiai rof one utb ton the eor?th

iSad y,neriedtlff ni teh axlepme aeo,bv uodlc itngae kcoeosi ni olpeep who dknir limk ldea ot a ninaiticfgs niaeecrs the sirk of in,nefioct tub nto in poeple ohw woh tn'did rkidn ilm?k

'vIe keolod noadur ni hits ommcetn t,hader dna ahve enes epelpo tmnoeni het emrt "tcffee fdiiomin;ac"to is tath whta my emeplxa vaboe odulw w?soh

In retho rws,od fi naiegt socoeki + ndgrniik lkim elsda to a cntgfnisiia rik,s btu tganie kosoeic + ton rngkdnii likm sah on iacadessto irsk, dlouw hatt naem ahtt teh ilmk ash na t"ffcee aodfctimini"o on het irks fo tgetngi iiftencon ni lpeeop ohw ate sok?eoci

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 +0  upvote downvote
submitted by unknown001(9)
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itsh is a snuob eq.snuito

hnew dosd ratoi si 1, ennimag no ,osaansiotci

dods og&at;itr 1, hiwch in stih snqeiout is 6, measn tnooscaiisa

eehwr is dsdo oarit ? )a at the eat tconoid-odkei rdink imlk mu.cnol nceeh hte aesnr,w noly koocei dldnpyntnieee .ass hwti e lioc

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 +0  upvote downvote
submitted by tyrionwill(22)
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we can akme shting msplei kile hsit iy:afw we natw to oknw ewhhrte ro1,X 2X rtreacoesl Y, ew sjtu ertspylaae stet 1X and ,Y and X2 dna Y iyo.clrcnagd Wenh ttse X1 wthi ,Y we iruqere on 2X s;xoepure hn eW tset X2 wthi ,Y we qruiree no X1 ru;oxespe

We tets ioceko hwti ,iraherad henw ikml was tno nudkr otp( )rthig: sotievpi e W sett kmli wtih aha,iredr when no ciokoe swa aneet elrwo( g):thir eangevti

uocoisc:nnl loyn ocieko saortrlece ot eht rardheia

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 -5  upvote downvote
submitted by lilmonkey(63)
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hTe oedrkyw is EN"De(Nds"DiPoEacN)ITLs.taEY Wihhc ni umnha uaalegng mnsae ON"T IDOT.ASAC"ES

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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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