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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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hsit etinquso kaesm me natw to tea an e icol coekoi dan poeh i bedel uto

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caitlyncloy  cikp C nda voem no wsa my tryegtas :P plhe llo +2
thegooddoctor2  llo dgoo eno +1
sparta  OLL hktan uyo ofr hits nctmoem +


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 +15  upvote downvote
submitted by doodimoodi(74)
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dDi no oen neocit htat het dsdO tiaor on hte opt eftl si og?rwn mA I isgnmsi ietn?sgohm If uyo lccluaeta t,i 'its 6 jsut ikel eth otp rhgit n.oe...

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mjmejora  ashtt tuyaacll lreyal nufyn +
yex  cueeBsa I aisd ,so esplipa .he.re. :-/ +1
doodimoodi  atnC ileeveb we pya 60$ fro this rpca +50
aisel1787  tbse metncmo oddomooi)id +1
b1ackcoffee  ahtt nicufkg rthew em off no amex. I wsa keli is three an fefect adtiioniomcf yb to"N gndiknri iklm". teh fuck! +2


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 +8  upvote downvote
submitted by sne(59)
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RO g&t1; inecdstia erneicdsa nrucerceoc of tvnee. The ynol OR gtrreea ntah 1 asw ni teh letba tath nticadedi atht eht estcujb eat soekoic tub itddn' idnkr im.lk ,Tush htat si eht lnoy oen htiw a isitfnniacg uoccreencr

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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 opeelp owh ralgenely had rotelub iregnad eth otw arhsct:

tsiFr :chtra We saetaredp the nrieet opulipoatn ntoi two msllare slpopanuito to tste for teh coiekso fefat.c In iunlooPatp A dnark( ilmk) reeht asw an odsd ortia fo 6 t(oyp ni eth lcaaut )rctha. nI uptlnPoaio B id(d not nkidr )kilm heetr swa na dsdo aiort of .6 eniSc the dsod itoras rea not 1, ew nca noelcucd ttha the soeokci eahv an ftecfe gsarselrde of the puopotnlia (ie kdarn klmi leppoe eusvsr tndi'd inrdk mkil eop).ple

ednoSc atcrh: weN est of uspponltiao to tets fro teh tfeefc fo li.km nI Plnuiopoat C ae(t )oscieko erhet aws na odsd tiora fo 1. nI tiopuPnloa D id(d ton eat oskoe)ic reeth swa loas na dosd oairt of 1. Thsi mnsea ttha kiml ddi not hvea na cfteef rvee dna dnt'di tbiroteucn ot het s.seedia

lyO"n eoickos rea iteneendpylnd cssaitaeod whit .E lcoi s"sace esnma htat nyol teh oociske uasec teh isedase tuwitho eth eftsfce of tsiohngem l.see

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 +7  upvote downvote
submitted by pg32(218)
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eTh fatc ahtt eht dsod rtioa ni het top telf is icorrcetn saekm hsit etqusoni ryve idlctf.ifu It eakms ti apearp as if the cokeois rea tvasieuac tub hte iklm dah osme tepcivtreo toaf.rc oS oboui.nsxo

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drpatinoire  dGo I utgtohh layltot hte same way as uoy dd.i I tesdar at sith qoesinut fro at taesl inm5 dna sekda fylsem 'swtah nwogr hitw my tss.isitcta +1


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 +7  upvote downvote
submitted by youssefa(162)
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aIiintlyl lmki dninikgr was otssaciade htiw iclE.o tkoreuab twih 3OR9.= and .0t;1&00lP ).innSicia.gt(f. eAtfr itonfisirctata niot tea eikosoc adn ddi not ate eocokis RO bamcee 1 idnaste fo 3.9 nigaemn het taosanisoic saeeiddar.pp ,herfeTore tanige scikeoo wsa a eoondfrnuc dna rhtee is on rlea snaoctisiao tenebew gkidnirn kiml nda ait.d..,li..oesncE sim'kl et(h )fcnrondeou citunonorbit aws eepsiborsnl rfo eht OR of 9.3 ni het sritf pealc. sThi swa uhfrtdree erdtatdemosn htwi OR of 6 in the kioscoe nloae rou.gp

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 +1  upvote downvote
submitted by sattanki(82)
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Tshi eon rehte rewe fruo sodd rs,aoit neo oderidpv under echa abl.te The lnoy neo that ahd na dsod troia etarrge hnta 10. asw the eltba in teh otp rtihg (Odds tRioa = 6, I )b,eeeliv hhicw newh uoy dlkooe at het lbeals, lde ot eht ighrt awen.sr

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submitted by famylife(110)
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"An osdd itaro fo 1 nteaicdsi ttha het ncoonditi or tenve deunr sydut si qyullea lilkye ot cruoc in othb .rspgou nA sddo rotai gtrerea tanh 1 eaiisdtcn ahtt eth dtcononii or teven is moer elyilk ot cruco in hte rtfsi ug.rp"o (:odkkepie.path_/dairioswgritid/sOint//w.)

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 +1  upvote downvote
submitted by xw1984(8)
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eTh OR in eht rppue telf 22 etlba si crioncte,r wcihh udlhos eb 6 (27/2*366 )=6, ont .1 hisT emnas eht OR of "tea sckieoo" sdoe tno gachen rfeat satriicifatont yb kndra" "m,ikl os n"adrk im"lk si otn a n,rcnudofoe adn aet" "eokisco is dyileennpnedt ossa /w CEEH etbao.kru

On teh threo anhd, OR fro nadkr" "imlk ehdngca a tlo ro(mf 93. to ,)1.0 hichw tiesnicda knad"r l"kmi mihtg be a nedoonrucf dn,a trfheeoer, si ont einepnltnydde asos w/ HEcE .auktebor

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 +0  upvote downvote
submitted by an_improved_me(91)
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A qosentiu i omer llyageenr vaeh ...is

Is it isobslpe that hnew oyu iftrtyas teh ,daat e.i.( cpaignmro eht fetcfe ttah anetgi koeosci sha, in poeple how idrkn ilkm ro peploe ohw do nto drnki )milk hatt het sodd irota will swho ianeiisfgcnc ofr oen but ont hte ?rtoeh

Sadi nyetdlf,rief in eht lmpeaxe bv,aoe uldco agneit koiesoc ni leeopp hwo rkdni mlik eadl to a icngisatinf sraneeci het kris of ,oinictenf utb tno in peelop owh how tdind' knidr im?kl

e'vI edlkoo aunrod ni shti tmoecmn ,headtr and ahve nese lpoepe tneoimn eht ertm ee"cftf "iacoitf;doinm si tath hwat ym lepxmae ovabe ldouw hw?so

In otreh r,dwso fi iegatn ociosek + nikirdng limk aldes ot a ntigisfaicn rik,s tub eigant okcieos + nto gnnkidri mlki ash on taaissoedc ,isrk owdlu htta eanm ahtt eht mlki ash an fe"ftec oofmiadcniit" on the ksri of gngetit niinotecf in peolpe hwo eat cieoo?ks

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 +0  upvote downvote
submitted by unknown001(9)
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itsh si a buson uin.qotes

nehw sddo roait is ,1 aenmgin on ,sioastcaoni

osdd gtti&ora; 1, hwhci in iths notiquse si 6, mnsae ontsaacisoi

eerwh si sodd toair ? )a at eht aet citooddkoi-en knird ikml uncom.l cnhee the nraes,w loyn oieokc neenenytplddi ass. hwit e cilo

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew can make gihtsn milsep ilek isht wfy:ia ew wtna to kwon hewreth Xo,r1 2X eleosrctra ,Y we ujts ryleaastpe stet X1 nad ,Y dan 2X dna Y .lcrndciagoy hWne test X1 wthi Y, we reurieq no 2X e;puosxre eW nh etts 2X thiw Y, we qeeiurr no 1X oe;xrsepu

We stte oikoce wiht iaar,dreh hnwe lmik wsa tno runkd tp(o )ir:tgh otespivi eW test likm with ah,eadrri ewnh no ckeioo aws teane leowr( hgri:t) eaengivt

lcosno:cuin yonl oiceok crelsreoat ot teh eradhira

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 -5  upvote downvote
submitted by lilmonkey(63)
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hTe ykrodew is D(eti.TaINoEEEaDdcL"NNsYP)s" ichWh in aunmh ualgaegn snmea ONT" .OSITSACDE"A

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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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