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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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isht tisuoneq easkm em wnat to eta an e clio icekoo dna peoh i bdlee uto

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caitlyncloy  cikp C adn meov no saw my sgtartye P: pleh lol +2
thegooddoctor2  lol oogd noe +1
sparta  LLO atknh ouy rfo sith tmocemn +


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 +15  upvote downvote
submitted by doodimoodi(74)
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idD on noe neicto ttha hte Osdd tiroa on the opt elft is g?rwno mA I gsmsiin mngeotis?h If yuo ucalletac it, t'is 6 sutj iekl eth tpo ghrit eo....n

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mjmejora  httas luaatlcy yllaer ynnuf +
yex  eeauBcs I sdai ,os salippe ee..h.r -/: +1
doodimoodi  Cant eleivbe we pya 60$ orf isth prca +50
aisel1787  setb emmtonc od)moiidood +1
b1ackcoffee  ttah cgiknfu etwrh me ffo on m.xae I saw elik si heetr na fecetf ooitafcidinm yb Not" nnirgkid il".mk eht kufc! +2


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 +8  upvote downvote
submitted by sne(59)
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RO g&;t1 iceaisndt acenireds rouccecrne fo tv.nee ehT yoln RO regreta naht 1 swa ni eth abelt ttha taiidcdne htta het eusjbtc eat ckoseoi ubt tdndi' rdnki m.lik T,shu htat is teh nylo oen iwht a cinsfgiitan rccneeocru

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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 oleppe hwo gllneyrea hda tleorub eairndg eht owt ctr:sha

rFtsi ctha:r eW reasdptea eth reitne atpoupinol iton owt rallsme nppolsoatiu to ttse fro het kieoosc ffeatc. nI putPoailno A nk(dra m)ilk ereth wsa an dosd toiar fo 6 ptoy( in het auclat .crha)t nI apluPontoi B (did nto knrdi )ilmk eetrh was an dosd raoit fo .6 inSce hte dsdo tirosa aer tno ,1 we anc odclcuen tath hte oosicek vahe an effcte rdaesrlges of eth ioplnapotu ei( nrdka iklm epople essurv d'dtin nrikd likm )plpe.oe

ndceoS t:rahc Nwe ste fo tlaopsnoipu ot tset for the cetfef of ilm.k In lonpaotuiP C ate( eoki)cso erthe asw an ddso aroit of .1 In oitpauoPln D dd(i not ate sikeoc)o hrete wsa aslo na sddo iotra of 1. ihTs nmaes ahtt lkim ddi nto haev na cftefe erve nad ndid't cuienrtotb ot eth ees.dais

yln"O eiokosc aer leynedtienpnd coaidsteas ihwt .E lcio as"ecs amnes thta ylon het scoioek aecus hte sasidee owuitth het tefsecf of tnmhogise s.lee

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 +7  upvote downvote
submitted by pg32(218)
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Teh fcat ttha teh dosd oatir in eth top etlf si roteirncc samke sthi sotiuqen evyr fcdl.itiuf tI skaem it apreap as if eth coiesok aer escaaviut tbu eth klim dah omse ertvcetoip frao.tc oS .obuoxnsio

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drpatinoire  oGd I hthtuog tllaoty eth esam ywa sa yuo id.d I dasrte ta htis oeunqist rof ta alets imn5 nad sdeak yemlsf sahw't rnwog twhi ym ct.sstiista +1


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 +7  upvote downvote
submitted by youssefa(162)
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Iaitlylni lkim dirginnk swa ssitaaedco hwti lEo.ic ukroteab wtih 9.3RO= and 1t.00&0Pl; i(.fitg)S.anin.c fAtre atianicfstotir nito eat soekico dna did ton eat eioksco OR abeemc 1 dstinae fo 93. gmaenin het scoasinoita eae.risadppd ,reerhTeof tigaen kcoosie swa a ornfndouec nda rheet is no aelr taoianoicss twebnee gkdirinn lkmi dna dlEs,oc.tn...ia.ie isk'lm hte( ec)furonndo bciunnottori wsa rnolsbpiese orf teh OR of 9.3 in the sitfr lp.aec iThs saw hreruefdt dettrdnoseam iwth RO of 6 ni teh skoicoe aleno .gopru

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 +1  upvote downvote
submitted by sattanki(82)
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Thsi eon hteer rewe orfu dods t,arois one iveddpor endru chea a.eblt Teh loyn eon that ahd na dsdo iroat etegrar tnha 0.1 swa het lbtea ni teh top tgihr (dsdO tiaRo = 6, I elibe)v,e hiwhc wneh oyu kedolo ta eht alebsl, del to het htirg renas.w

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 +1  upvote downvote
submitted by famylife(110)
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n"A sdod ortai of 1 aniscdeit hatt eth toindnioc or vteen uedrn uytsd is uylleqa llkiey to rucco ni btho pgour.s An dsod raito taerreg tanh 1 cneiasdti ttha eth incoiotdn ro vente is more yilkel ot roucc ni eth trisf u"r.pog (ion:ws/eerOaat../pkh/_/ddkrwitiipidgisot)

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 +1  upvote downvote
submitted by xw1984(8)
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The RO ni eht perpu eflt 22 lbeta si inr,cocert hwcih hosdul eb 6 2(7362/6* 6,=) ton .1 hsiT senma the OR of ta"e kiosc"eo dsoe not caenhg efatr nftasoicitarti by "rnakd lk,"mi so ark"nd k"mil is not a fe,rundonoc adn "eat "kooesic is ydninneeletpd saso w/ EECH .btoauekr

On eth eorth hdan, RO fro a"rkdn kl"mi ncghade a tlo f(orm .39 ot 1,.0) ihchw sndtcaeii kn"rda "ilkm mhitg eb a ncoudfreno da,n eeorhertf, si not tineepeddynln aoss w/ EHcE otu.rekab

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 +0  upvote downvote
submitted by an_improved_me(91)
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A tsuqneio i rmeo ergellyna veha s.i..

sI ti pbeoliss ahtt wnhe oyu ifatsyrt eth data, ..i(e acnrmgoip teh ceffet taht gnaeit eckioos hsa, in ppleoe woh ridkn lmik or lepepo who od not nikdr lm)ik htat the sddo rtaio llwi swoh fgiiinccasne orf eon tub ont het h?tero

Sida eyintflfer,d in the eaelxmp baoe,v ocldu nigaet ieoscok ni lepepo ohw dirkn imlk dael ot a sfiiinnactg crneieas hte ikrs of ie,cnoiftn but ton in oelepp woh how n'ddti inrdk klmi?

Iev' lodkeo runado in tshi tmmecno ,tahedr and hvae ense poleep onminet teh temr cfeeft" tm;cdfoino"aii si atth awht ym laexmep obvea dwolu wohs?

nI hreto drw,so if ntgeai ckoieos + knnrigdi lmki dseal to a snniaiftcig irk,s tub aenigt kcooesi + ont irigknnd mkli ahs on cdeaissoat risk, lodwu taht nmae taht eht lkmi has na tfeef"c iomafiicntod" no eth iksr of getitgn eintiofcn in pepole who ate csooi?ek

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 +0  upvote downvote
submitted by unknown001(9)
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hsit si a usbno .qtoiuens

newh osdd tirao si 1, iamngen no osansoa,icti

sodd aigrott;& ,1 hcwih ni ihts nueostqi is ,6 mnsae noaoactsisi

eewrh si odsd otrai ? )a at hte eat doenioickt-od rinkd imkl um.lcon chene eht naser,w nyol cikeoo nedidtpenleyn .ssa iwth e clio

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 +0  upvote downvote
submitted by tyrionwill(22)
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we acn kema hngits imelps ikle this yfwa:i we tnwa ot nwko rtewehh r,1Xo 2X laterroecs ,Y ew jsut lsrpaayeet ttse 1X dna Y, and X2 dan Y d.cgoncilrya hen W tset X1 wiht ,Y ew rireuqe on X2 rxeue;osp enhW ttse X2 tihw ,Y we rieeurq on X1 epeo;sxru

eW sett kiceoo with hid,rarae hewn kmli wsa nto rkndu (tpo hi)rtg: iieotsvp W e test limk twhi aha,rdier ehwn no oickeo saw eenat e(lowr i:g)trh evgiatne

oc:uioncnls yoln iockoe aroeesltcr to het aarriehd

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 -5  upvote downvote
submitted by lilmonkey(63)
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heT edyrkow si NIE"c)LstDa.eEaY"ENoPTsdiND( ichWh ni namuh gnaulgae nesam O"NT OD.EITACSA"S

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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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