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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 ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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 +67  upvote downvote
submitted by โˆ—niboonsh(409)
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thsi ieuoqnts aksme em tnaw ot tea na e lcio ckiooe adn epho i eebld uot

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caitlyncloy  kicp C nad evmo on asw ym tarygest :P phel lol +2
thegooddoctor2  llo odgo oen +1
sparta  LOL nakht yuo rof hits mtmcone +


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 +15  upvote downvote
submitted by โˆ—doodimoodi(74)
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Did no eno oincet atht hte dsOd airto no eht opt lfet is ongr?w Am I gimsnis n?oitsmegh fI ouy aullectac i,t 'sti 6 sjut iekl eth tpo thirg ..eon..

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mjmejora  tatsh yatclalu rlelya ynnfu +
yex  eBcaues I isad ,os lpaipse he.e..r /:- +1
doodimoodi  atnC ievlebe we ayp 6$0 rfo tshi pacr +50
aisel1787  esbt mmnocte mdoidoodo)i +1
b1ackcoffee  ahtt ukinfgc rweht me off on ex.am I wsa klie si heetr an teeffc ociiofimnatd by N"ot nirdnikg .k"lim the fk!uc +2


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 +8  upvote downvote
submitted by โˆ—sne(59)
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RO g;1t& idasitnec aediresnc eoruernccc of n.vtee eTh nlyo OR rrageet nhat 1 saw ni het taelb htta dactediin ahtt the btcseuj tea sekioco btu dtdni' nrkid ilmk. s,Tuh ttha si eth lony eno htiw a iafsngnciit rncecoreuc

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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 โˆ—qiss(20)
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For epploe ohw allegnery dah lubtoer daering eht tow h:ctsra

rsFit tc:ahr eW strdpaeea eth tinere loinuotpap nito otw smalerl laisponoptu ot sett orf teh iseocok e.tfafc In ianouoptPl A rnk(da )lkmi there saw na sodd toari of 6 tpoy( in the tlacua trh.ca) nI utlPiaonpo B did( otn ndirk il)mk erhte was na ddos rtiao fo .6 iecnS eht dsod rasito rae ton ,1 ew can elccnduo atht hte kociseo avhe an efetcf selsradgre of the uonpatiolp (ei dnark lmik olepep resuvs dt'dni drikn mkli ee)ol.pp

deonSc tr:hca ewN ets fo spalpnoouit ot ttes rfo eht effetc of lik.m In utlapioonP C t(ea oskc)ieo ether aws an ddos traio of .1 In nolpiutoPa D (ddi ton tea c)iksooe rehet saw sola an dsod triao fo 1. hTsi nasem that klmi ddi ont vaeh na tfeecf vere nda dn'dit crnoiubtet to teh disaese.

"yOln ikcoeos rea dntlpnedyenie eoisdtaasc hitw E. ciol csa"se amesn htat olny teh ockosei caesu the saeised itwutoh teh cfestfe of gonmitehs eels.

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 +7  upvote downvote
submitted by โˆ—pg32(218)
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ehT cfat ahtt eth dsdo atiro in hte opt letf si rotcnrice aksme itsh tsuonqei ryve .duiifflct It semka it epapar as fi the keocsoi era ecatvsuia btu eth lmik hda eosm rttvpecioe cof.rat oS onosu.obxi

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drpatinoire  odG I ugththo tlyalto eht smea yaw as you d.di I asdert at tsih neoqitsu rfo at letas im5n nad sadek mslyef 'whsat rgnow hitw ym aittscists. +1


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 +7  upvote downvote
submitted by โˆ—youssefa(162)
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Iinilltay mikl inigknrd was seoacaitds thwi oc.iEl routbake wthi R.3=9O nda 00tl;1P.0& nSani.gti.fic(.) rfeAt inictasratitfo niot aet oskeoci adn ddi ton ate csokeoi OR meceab 1 dtneisa of 39. mnngiea teh ootscnaasii ere.adsaippd ere,Tfhore tngiae esocoik was a unfdoneorc dan ehert is no rlae tiocsasiano ntbeewe iikndrgn ilkm and o,ni.ead.s.i.ct.lE ms'kli e(ht o)unfndocer nnorbuciitot was npierseolsb orf het OR of 93. in eht fitrs cap.le siTh asw hdrterefu rdttemsoadne htiw OR fo 6 ni het ekiosco lnoea pugo.r

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 +1  upvote downvote
submitted by โˆ—sattanki(82)
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iThs one ehrte eerw oufr dods as,toir neo vpdodrie ndure aehc lebat. ehT ylno noe that adh na dsod raiot earetgr nhta .01 saw hte atlbe ni teh tpo rtghi (Odds aoRti = 6, I ,ibelv)ee wchih hwen uoy odeklo ta eht eabs,ll del to teh trigh s.anwer

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 +1  upvote downvote
submitted by โˆ—famylife(110)
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"nA sodd oaitr of 1 tnsieadic taht eht nidotnoci ro eevtn udnre tusyd si uqlyael lleiky to uccor ni htob pgu.sro nA dosd roait etregar htna 1 atnecidis ttha hte ondcitoin ro vteen is roem ykille to coucr in eht tsrif pgu."or (O:eaoh/kwi/piwri/sd/rti.odn.tpiadg_kiets)

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 +1  upvote downvote
submitted by xw1984(8)
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eTh OR in het ppreu felt 22 aelbt si tienr,croc hwchi losudh be 6 2(763*/62 ),=6 tno 1. hTsi manes teh OR of "ate eoioks"c esod not nagche afrte fitsicirtaoatn by nrda"k "kilm, so rn"kda kmi"l si nto a rdocefo,nun and et"a osoikce" is eepndteiynlnd asos /w ECHE aoue.rbkt

On the htore hnda, OR orf kd"nar "mkli gecdnha a lot mo(fr 9.3 to )0,1. ichhw itnecsaid dknra" m"ilk hmigt be a ruedfcnnoo ad,n feo,trerhe si ton nennydedtiple sosa w/ EcHE r.ktbaoeu

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 +0  upvote downvote
submitted by โˆ—an_improved_me(91)
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A tqsuonei i orem lnrlgyaee vhea ..is.

sI it ibspoles thta enhw uyo taytifrs eht adat, .i(e. coianpmgr teh ftceef atht nigtea cookies ,ahs ni opplee owh rkdni mlik ro elepop who od ont irdnk )imkl atth hte sodd tirao llwi ohws iifcsengcani ofr eno btu ton eht r?etho

aSid lifyrdte,nfe ni hte lmepexa avbeo, oulcd nateig ecoksio in peloep hwo kidrn imkl ldae ot a afisngtciin cnseaire het iskr fo ntceoinfi, but ton ni opeple woh owh di'tnd ridnk k?ilm

'evI okdleo rauond ni isth necotmm tadhre, dan hvae esen leppoe mieonnt teh metr fectef" dto;ioi"maicnf si hatt hwta my elexamp baeov uoldw hos?w

nI reoht srdo,w if tnaeig okscoei + dkrgiinn ikml ldsea to a fcagiitnisn rk,is but teagin okciseo + nto irngikdn ilkm hsa on cdaasteosi ,irsk wudol htat mena htta the klim sah na efcte"f "iomcdintfioa on hte ikrs fo iggtnet eniotnicf in pepelo who tae oiokce?s

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 +0  upvote downvote
submitted by โˆ—unknown001(9)
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ihst si a nusob uietqo.sn

nhew sddo roita si ,1 eimgnna on n,isicaastoo

odds og&trit;a ,1 chwih in tihs qsonitue is 6, ensam sotcaaionis

erehw si dsod otair ? )a at the ate koeinotiddoc- dkirn mkil lcn.uom ecehn the ra,swen oynl coieko etdyneinnepdl s.sa hwti e ocil

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 +0  upvote downvote
submitted by โˆ—tyrionwill(22)
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we acn meak gnshti epimsl lkie this way if: ew wtan ot know hreetwh Xo1,r 2X olreacsetr Y, ew jstu spleeyarat sett X1 nda Y, dna X2 nad Y oncglrc.diya henW ttse 1X ihtw ,Y ew ereriqu on 2X ex;esuorp h neW tets 2X hitw Y, ew erirueq no X1 xoerueps;

eW etst okcoie thwi deairrha, wneh kiml saw tno ndukr (top gr)iht: opstiive eW tste imlk wthi reiahdra, nehw no kceooi swa eneat wroel( :ithrg) eienagtv

ncosuicn:ol yoln iookce lcserteora ot hte hedrriaa

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 -5  upvote downvote
submitted by โˆ—lilmonkey(63)
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Teh edwkoyr is EPDa(dTIYaELteN"isNN.osED")c hWhic in hmnau naeggual emnsa N"OT "OCS.AEIADST

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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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