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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 tuniqose kemas me nawt to eta na e ocil eooikc nda hpoe i eldeb uot

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caitlyncloy  pcki C nda mevo no wsa my gtyseatr P: phel lol +2
thegooddoctor2  lol godo oen +1
sparta  OLL haktn ouy orf hsti mmtnceo +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi on oen etocin htat the dsOd artio on het tpo letf is nog?rw mA I gissinm tgmni?oesh If ouy caactllue ti, sit' 6 stuj kiel the otp rhitg ....one

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mjmejora  staht uaacllyt rleayl yfnnu +
yex  eeBasuc I aids so, seappil ..e.ehr :-/ +1
doodimoodi  ntaC eelbvei ew pay $06 orf hits acrp +50
aisel1787  stbe emmcnot )mddoiodooi +1
b1ackcoffee  that kcinufg rthew me off on m.xae I asw keli si hrete an ftfcee adfimiincoot by "otN ikngidnr .ilkm" teh f!ukc +2


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 +8  upvote downvote
submitted by sne(59)
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RO g1;&t adtnsicie rsadceein oneucreccr fo n.etev The oyln OR earrget tnha 1 wsa in the abtel taht tiidadnce thta eht tsecjbu tae ooekcsi btu itnd'd dikrn kmi.l Ts,uh atht is hte lyon eno wtih a ncftnsigaii neeruorccc

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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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orF epeolp woh lanelyger dha luotreb aridnge hte wto sh:tacr

rtisF hr:atc eW seadartep hte ritene outlpoapni niot two rmsllea pnapsliotuo to etst for the coiseok ect.aff nI utaoolpPin A (andrk mik)l three asw an sddo roita of 6 y(top ni hte altcua c.h)tar nI uonltPapoi B id(d ont drink )ikml rhtee asw an ddso orati of .6 iSnec eth odds arsoti era ont ,1 ew nac dclucoen htat eht keoosic vahe na ftcefe dssrgelera of teh olpaopuint e(i anrkd lmki epelop sesvru didn't iknrd mikl .pleo)ep

nSdeco a:thcr wNe ets fo tsolpaipuno ot tste fro teh teecff of limk. In ianpluootP C a(te oc)iseok herte was an sodd oarti of .1 nI uoaniotlPp D d(di ton ate keo)oisc ether aws alos na ddos ortai fo .1 Thsi mnsae taht lmki did tno ehav an ftceef evre adn 'ditdn enrcouittb ot hte esse.aid

Oln"y ecsoiko are yennepldntedi aocaetsdsi tihw .E lcio casse" senma ahtt nlyo eth eckoios esuca eth esisead wuhoitt hte tsecfef of eogshinmt e.sle

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 +7  upvote downvote
submitted by pg32(218)
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ehT fatc that eht sdod otiar ni hte pot tfel si rtricocen asmek thsi neqituso revy iftifcudl. It semka it ppeara as if eth ksecoio ear uaecaistv btu teh kilm had seom pcvettoeri cfotra. So uoixoo.sbn

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drpatinoire  oGd I hthuogt tltolya het emsa way as you id.d I reatds at hsti quentois fro ta altse n5im dan ekads fslmye hwt'as gnwor wthi my s.ttissctia +1


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 +7  upvote downvote
submitted by youssefa(162)
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yitlilanI ikml kgindnir wsa ictosdaeas wthi lio.Ec okutearb hwti 3.=OR9 dan .;0lP&010t g)iin(n.ta.iSc.f efrAt afairtittsonci noit tea cioskeo nda did not ate osiceok OR maebec 1 itadesn of 9.3 ninmaeg eth itosoniscaa rpaesdd.aepi re,refoehT itaeng ocseoki was a eunnordofc dan erhet is no eral osasoaciitn eeentwb gkiinrnd imlk and oas,il..d.tc.en.iE smki'l t(he fneocd)nrou iouiotrncbtn was sneboerplsi rfo hte RO fo 3.9 in het stfir a.pcel isTh aws truehdefr sneodtdetamr iwth OR fo 6 ni hte kieocos noela .proug

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 +1  upvote downvote
submitted by sattanki(82)
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Tihs eon ereht erwe oruf dsdo o,artsi eno vpdodeir dnure ehac b.tael Teh nylo one ahtt ahd na sodd orait reraetg tnah .01 asw eht atebl ni eht top rghti (Odsd taiRo = 6, I eib,veel) hwihc enwh you okdloe at teh ,slelab led ot eth thirg neasr.w

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 +1  upvote downvote
submitted by famylife(110)
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n"A ddso tairo of 1 enaiicdts atth eht cnnodioti or evetn eudnr dsytu is uayqlel kileyl to uccor in tbho .gruspo nA sdod oatir reeagtr htna 1 dctsiaeni atth eht dtooincin or veetn is mero yeikll to corcu ni hte itsrf pgro."u (hkadweiosap_sierdn:kot/gi//Oiwtpr/t..dii)

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 +1  upvote downvote
submitted by xw1984(8)
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eTh OR ni het ppreu ftel 22 elbat is e,triocncr hwhci lsohud be 6 7(2/366*2 ,)=6 ont .1 isTh neams the OR of ae"t "cokeosi seod nto aghcne fetar raftitnaoicsti by n"dkar mk"li, so rndk"a klm"i is not a ennc,ufodor dan ate" skioco"e is nynelpedniedt soas w/ CEEH tuakb.eor

On het toreh ad,nh RO fro d"arkn i"kml endcagh a lto ofrm( .93 ot ,.10) hhiwc nctisdaei kd"nra kil"m mgith be a oenofncdru da,n thrfer,eeo is ont yenenildntpde saso /w EEHc .btkoeuar

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 +0  upvote downvote
submitted by an_improved_me(91)
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A sqnoiteu i ermo nllyareeg have i...s

sI it oseblpsi atth wnhe uyo istafrty eth a,tda (e.i. iacpmngor hte ceftef that eiatng ksiceoo s,ha ni eelopp owh inrkd mlki ro opepel ohw do ton kdnir mkli) ttha eth sddo atroi ilwl shwo icfeangsncii fro noe btu otn the ero?ht

diSa iterfedfnl,y ni het apmleex a,boev uocld aitgen okoiesc in eppoel owh knrdi kmil aedl to a fctnngiiasi sraecien het irsk fo ,iicfnneto tub ont in opeple how hwo 'ddtin rikdn ?lmik

vIe' oledko udrano ni itsh oenmctm edrth,a nad ahve enes opelpe mneinto teh retm "efecft mc;andooiti"if is hatt awth ym xmlepea veabo doluw s?who

In eotrh wso,dr fi aentig ockiose + inirdkng klim sdlea to a niancsfiigt i,krs btu tnagei eiocsko + ton dinrgkin ilmk hsa on otsieasdac ,ksri uwdol atht mnea hatt teh kmli sha an ee"fftc taiodcfi"mnoi no teh kris of ngtitge ifnconite in lopeep woh tea ?iceoosk

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 +0  upvote downvote
submitted by unknown001(9)
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itsh is a unobs .itseuoqn

ewnh odds iorta is 1, miaegnn on ataosi,icnso

dosd ir;g&ttoa ,1 chwih ni tsih toqseuni is 6, masne oasiaoisctn

hrwee si dods tioar ? )a ta eth tae oo-idtincekdo kdrin mlik .cmnlou eechn eht sern,aw nloy kecioo nndeetlnpyied ssa. ihtw e iloc

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 +0  upvote downvote
submitted by tyrionwill(22)
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we nac mkea ngtsih slmiep kile tihs fwi:y a we awnt to wnko hwheetr o,rX1 2X ceolratres Y, we tsuj eysrtaelpa sett 1X nad ,Y nda X2 dna Y aocgrcdilny. nW eh tset X1 itwh ,Y we eeurirq no X2 usre;epox Weh n etst 2X with ,Y ew erequir on X1 xesreo;pu

We tset okcieo whti radarei,h nehw ilmk was tno dunrk o(pt )h:tigr pitesiov We stte ilmk wthi rihe,daar hwen on oecoik swa netae olw(er gi):hrt evngaeti

coc:nulsnoi loyn cookie reeatoslcr to hte herdiraa

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 -5  upvote downvote
submitted by lilmonkey(63)
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heT rdyokwe is tiE.dN")D(LsDYesaPTENaIocEN" ihWhc in haunm egaulnag anmes OTN" TAOI.AES"SCD

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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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