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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 uqtosien eksma em natw ot eat na e olic coioke nda eoph i ldeeb otu

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caitlyncloy  ickp C adn evom no wsa my tretaysg P: lhpe lol +2
thegooddoctor2  llo odog eon +1
sparta  LLO aknht you fro tihs mmctneo +


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 +15  upvote downvote
submitted by doodimoodi(74)
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iDd on eon tenioc hatt het ddsO orati on eht otp ltfe is nor?wg mA I simnigs ?ineomgtsh fI you celuclata ti, 'ist 6 tsju ikle hte top rihgt e.o.n..

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mjmejora  tthsa yaluclta yelarl fnynu +
yex  sBceaue I aisd os, pesilap h.ee..r /-: +1
doodimoodi  ntCa lebivee ew ypa 60$ rfo tihs pcra +50
aisel1787  tebs tconmem i)oddoomido +1
b1ackcoffee  hatt cufnkgi rwhet em fof on ame.x I was eikl si eerht an ecefft nomtfdiaiico by "toN ginnridk mi"l.k eth !fuck +2


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 +8  upvote downvote
submitted by sne(59)
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RO 1&;gt dtsieacin aiednsecr rouecncerc fo evne.t ehT nlyo RO rrgtaee htna 1 asw ni eth ltabe taht cdidinate htta the cejbuts ate eioscko btu 'ndidt kdnir k.mli hT,us thta is the lony eon whit a tisafniincg ecrcruoenc

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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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rFo lpoepe hwo nyeglrael adh utlerob andireg eth wto :tasrch

Ftris :acrth We paesrated hte ietnre plotaiupon onti tow melarls oouptnaslip to tset fro hte skeooic tcfe.af In atouPiopnl A akndr( )imkl hetre was an odsd iotra fo 6 ty(po in het aalctu rc.a)ht In laPouitnop B d(id ont indkr i)mkl eerht aws na ddos traoi of 6. enSci eht osdd trosai era ton 1, ew acn loudccen that hte eckoosi vaeh an ctffee gsdlearres of eth nptaiolopu i(e nradk milk eepopl sresuv 'itddn nrikd imkl p.oe)lep

neodSc tcarh: weN ste fo opalsutnpoi ot estt fro the efefct of km.il In naiolpPtou C (tea si)eokco etreh aws na sodd roati fo .1 nI ulaioPpnot D i(dd otn tea soe)ciko rehet aws sola na dsod ortai fo 1. ihsT seman htta milk ddi nto ahve na etfefc evre nda di'tnd uirencotbt ot het .eaiesds

l"yOn ciekoso rea deinnelnypdte stdecosiaa tihw .E loic seasc" enams hatt nyol teh sceokio scuea teh sdiseae thuwiot eht fftseec fo imteoshgn seel.

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 +7  upvote downvote
submitted by pg32(218)
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eTh ftac atth the odsd otiar ni the pto tlfe is iectnocrr esakm shit iesntquo eryv dfc.itiflu It skmae ti aprpae sa if eht icsoeko aer iavscaute utb het mlik dah esom ricetepovt .acfotr oS uoixsbono.

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drpatinoire  oGd I htouhgt tytolal eht sema ayw sa oyu di.d I sartde at sith itsonueq rof ta alset i5nm nda asdke sfymel t'ahws orngw wiht my ststtas.cii +1


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 +7  upvote downvote
submitted by youssefa(162)
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allinitIy kmil nrikgnid wsa dcesatsioa tiwh Eiol.c ueaokrtb twih =93OR. dna lP0;0t10.& (.ci.n)inStiaf.g Afetr foaiiattscirtn noti eat ookcies and ddi ont tae sekicoo OR mceeab 1 daisnte of 9.3 amgnien eth asiotcanosi dapide.psare erfeehTor, ingtea oikcseo asw a ronenuocfd adn ehter is on lera inoatosasci ebnewte rgknidin mkil adn itdcs.Eoeila,...n. kms'li (eht dof)enrncou itonrbconuit was siprnbsloee rfo hte OR fo .93 in the ritfs pael.c ihsT swa ederfrtuh noetmesdrtda itwh RO fo 6 ni eth ioekosc aonel r.pugo

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 +1  upvote downvote
submitted by sattanki(82)
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sihT neo eerth weer ruof sdod tro,sia neo irdpvode udner ache te.lab Teh olny one thta ahd na odsd aorti etrgera nath .01 swa eht btale in teh pto itgrh (dOsd iatRo = 6, I )eeie,bvl cwhhi nhwe ouy doloek ta hte lalebs, dle to eht irhtg ew.nasr

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submitted by famylife(110)
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"nA sddo troai of 1 neidticsa thta eth tinoodicn or eenvt deunr dutsy is leqlyau lilyke ot occru ni hobt sgrupo. nA sodd toari eertrga htna 1 ceatnisdi tath the niocdonti or evetn si rome eiykll to ucrco in hte srtif ug.o"rp (iedgdpit.O:_w//nwk/sirsoi.ohad/iktiretpa)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe RO ni the ppreu lfet 22 lbtea is r,ercoictn hchiw dlhuso eb 6 (723*6/26 ),=6 ont .1 iTsh mnesa the RO fo t"ea keisoo"c osed tno ncaegh eftar sonraictatiitf by nakrd" ki"ml, os rndka" i"klm is ton a freonud,cno adn tea" ko"oeisc is pdnnyendeeilt osas w/ CEHE akbu.treo

On eht otreh h,nda RO ofr k"danr iklm" adegchn a lot om(fr .93 to ,1)0. wichh adtcsiine rkadn" k"mil gtmih be a ndnuecfroo ,dan ,eheforert is tno yetpdeilndnen aoss w/ EHcE r.tebuoka

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 +0  upvote downvote
submitted by an_improved_me(91)
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A notiuqse i omer gnleyeral hvae .i.s.

Is it elposibs htat hwen uyo sfitrtay the tda,a i(e.. mpgrionac eht cteffe ahtt geatin oickose ,ahs ni epleop ohw kridn likm ro lppeeo hwo od otn inrdk )mkil hatt eht dods ortai lliw sowh fneciiisangc orf neo utb not eht other?

adiS dfn,ieftelry ni hte emeapxl obvae, loduc eaintg seiokco ni pelpeo who dnkir likm aedl to a iitfgancsin neciresa hte srik fo n,ineoitfc tbu otn ni loepep ohw owh tdidn' knrdi klmi?

'Ive edolok ouradn in itsh ctenomm e,athrd and aevh nsee poplee enmotni the temr "ceffte oinifc"om;iatd si ttha tawh ym lexpeam aoebv udlwo wsh?o

In oreht dsr,ow fi tgeain iskoceo + ikdnginr lkim slaed to a nsitainfgci iks,r ubt tgaien ooseikc + ont inirnkgd imlk ahs on casadoites srki, luwod atth nmae htat teh mikl sha na eftcf"e ticndoaofiim" on teh ksri fo igegntt fiioencnt ni eloepp how tea scooeki?

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submitted by unknown001(9)
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itsh si a bonsu eiotsn.qu

ehnw ddso tario si 1, gmnnaei no toacassoin,i

dods &agiott;r 1, hihwc in siht otqsniue si 6, sneam ascoainisto

heewr is odsd raiot ? )a ta hte eat oion-dkcioedt dinrk ikml onm.lcu ncehe eth rnws,ae olyn oeicok typenidnednle sa.s htwi e loci

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submitted by tyrionwill(22)
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we acn eamk ngisth psemli elik ihts afy :wi we natw to onwk erehtwh r1,Xo X2 terelaocrs Y, ew stju eerptyalas sett 1X nad ,Y nda 2X nda Y rco.iycldnag h nWe estt X1 wtih ,Y we irueerq on 2X epex;sruo h Wen ttse 2X ithw ,Y ew erueirq on X1 spueoe;xr

We tset oeikoc whit riaadre,h enhw mkli aws ton dnukr o(pt git):rh etvsoiip We stet mikl wiht dher,aiar nhew no kocieo swa etena ero(wl igrh)t: egntveai

n:unilcsoco ynol ookeic tlceerrsoa ot teh haradeir

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submitted by lilmonkey(63)
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The oweydkr is P.edsasTNEEENI"DLDta"(oNc)Yi hWchi in anumh aelngagu nmase "ONT E"DATOSIS.AC

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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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