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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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stih iqeotsun skaem em nwat to tea na e iloc kcoeio dna eoph i ldbee tuo

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caitlyncloy  pcik C nda omev no swa ym eagtryts :P ephl lol +2
thegooddoctor2  oll oodg eno +1
sparta  LOL ntakh uoy orf shit ntecomm +



 +15  upvote downvote
submitted by doodimoodi(74)
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Did on eon icteon taht hte Odds ioatr on eht tpo ltef si gw?ron mA I gssniim ?miogtsenh If you ecaatlluc it, sti' 6 ujst iekl eht pot trigh ...o.en

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mjmejora  atths tyalluac lerlay fnyun +
yex  esuecaB I idsa os, ilpeasp r.eeh.. :/- +1
doodimoodi  tnCa evieble ew pya 06$ rfo itsh rcpa +50
aisel1787  tesb onmcmet ddd)ooooimi +1
b1ackcoffee  tath kicfugn whrte me off on ea.xm I wsa eilk is ehtre na cfftee odfatiicinmo by t"No giridnnk ilkm." hte cfk!u +2



 +8  upvote downvote
submitted by sne(59)
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OR &g1t; iaeincstd rcneadies noerruccec of nev.te hTe lnoy RO eregart naht 1 asw in the bleat that ncitadedi tath hte ubjtecs tae ooskice btu idt'dn knrdi mkli. ,hsTu atht si eht yoln eno twih a iftnangicis ececurncro

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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)


 +8  upvote downvote
submitted by qiss(20)
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oFr eeolpp ohw geenalylr adh eulrotb geiradn teh owt rct:sha

srFit :trach eW ertsdaepa the erniet ilpooptnau tion two mlslrea ooliapspunt ot stet orf het ooescik a.ffect In opinotPula A kdnra( )milk rhtee wsa na odsd iaotr of 6 po(ty in teh talcau h)c.art nI aPtopoinul B di(d not knrid )lmki reteh aws an dsod rtaio of 6. ineSc hte dosd stioar are not 1, we acn ncuoecld htta het seikooc aevh na etecff lrrdsegeas of eth ioutaplopn ie( dankr lkmi poeelp svuesr d'dnit ridkn ilkm )eppo.le

odScen :htarc eNw tes fo snuopatlpoi to sett for eth fetcfe fo iml.k nI itoPpaloun C ae(t soo)ikce reeth saw na dsod iator of 1. nI otlnPpouai D (ddi tno ate skio)oec eetrh was asol an dsdo iaotr of 1. shTi aesnm hatt imkl idd not vhae na tfefec vree nad nti'dd tbutieconr ot het e.esdisa

nlOy" ekocois aer lniyndpendete ioaasdcets hiwt .E lcio es"sca naesm taht onyl hte kocoesi ecasu eth sdesiae itohtwu hte fefstce of gtmihseno el.es

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 +7  upvote downvote
submitted by pg32(218)
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Teh tacf tath hte sodd ritao ni eht opt tefl si rcrniceot kames siht toniqeus vrey liucdfif.t It asmke ti reappa sa fi teh oikesoc rae aescaviut tbu het limk hda mose tierpotcev trf.aoc So sunbooxo.i

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drpatinoire  dGo I huthtgo yloltat hte esam awy sa you .idd I datser ta shit nituesqo fro ta estal 5mni dan kadse mflsye 'ashwt wgorn iwth my icst.tsiast +1



 +7  upvote downvote
submitted by youssefa(162)
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tniIilaly limk gnindikr asw socaadseti twih ol.Eci ekbaortu ihtw O9R=3. adn 0l&t1P;0.0 iS.c(a)ft.iign.n fterA satfoictaniitr toin tea iceksoo adn idd not eta coeikos RO eambec 1 sidnate fo 39. menniga het scaanoitsio rasedppei.ad fhre,orTee ietnag okseico saw a nuecrodfon nda ereht is on lare naisotocsai ewbeetn rkiindng klim adn ,tsi.n.l.dE.c.eiao 'mlski h(et nro)euofdcn nttniorcobiu wsa eelssonbpir rfo teh OR fo 93. in eth itrsf .plcae iThs wsa huretdrfe oeasemrttdnd iwth OR of 6 ni teh ecsooki nleao .upgor

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 +1  upvote downvote
submitted by sattanki(82)
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ishT eno etreh eewr ufor sdod tsar,io neo ievddorp unred caeh lta.be hTe lyon oen ahtt had na osdd iaotr etgerar hant 0.1 asw teh eblta in teh top ihgtr (dOds Rtiao = 6, I e)vb,elie wcihh nehw uyo doeokl ta teh llb,esa edl ot teh gthir w.srean

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 +1  upvote downvote
submitted by famylife(110)
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An" sddo atroi of 1 dciesinta htat eth onioitncd or vntee uednr tyuds si qlaeylu iklyel ot uccor in tohb osprg.u nA osdd ratio rareget hnta 1 cdisteian atth teh indcoinot or tneev si remo ylkeil to ocrcu in teh irfts r"go.up (tewpi/it_pds/oO.r:skeiddwat/og/rihi.naki)

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 +1  upvote downvote
submitted by xw1984(8)
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heT RO in teh uppre ltef 22 ealbt is o,rcncteri ichwh dhslou be 6 72(6263/* 6),= otn 1. hTis smean eht OR fo t"ae "oikecos osed nto hgnace terfa tiiniaarsfoctt yb dnkra" "limk, so rknad" "mlik si ton a odnf,euoncr nad ta"e o"cikoes si pnytieeedlnnd saos /w EHCE uraet.bok

On the htore nd,ha RO rfo "dkran mi"lk hgcande a lot rm(fo 39. to 1,.)0 hhcwi tenadisic k"rnad l"kim tgmih be a cnderonouf an,d o,htrefere si ont pnedetnenlydi aoss w/ cEEH atrueobk.

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 +0  upvote downvote
submitted by an_improved_me(91)
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A utnqsoie i mero erneyglla avhe si...

sI it bseolspi ttah hewn uyo tsfraity the ad,at i.(e. rnpacmoig hte eftefc htat atnige kscoieo ah,s ni eeoplp ohw ndrik imkl ro eelppo how od otn rndik l)imk that hte sddo aiotr liwl shwo iniifasgncec fro eno but nto hte oethr?

diSa ndyieflef,rt in hte apexmel o,bave doulc eintag skooice in peeopl hwo idnkr mkil ldea to a nfacgnitisi enseacri het riks of nnc,oiieft btu tno ni opelep how how tddin' rikdn ?iklm

v'Ie kelood drauno ni htsi tcmomne r,dheta and vaeh enes eploep teoimnn eth term c"tefef "modia;ficoitn si ttah athw ym mepxlae veoba lowud oh?ws

In hoetr w,rsod fi egtnia cieskoo + dnnriikg kmli slaed to a afiisinctgn ,kisr ubt eintga oeiscok + not ingdrkni limk sha no osdesiacta sir,k dlouw tath aemn tath hte klmi sha an ftc"fee "cniaiofdmoti no hte sirk of itngteg ntoiniefc in eoeppl who ate sckeoi?o

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 +0  upvote downvote
submitted by unknown001(9)
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ihts si a bsuno on.suqeti

ehwn osdd atori si ,1 neangim no aa,iotincsso

osdd gaotrti;& 1, iwchh ni stih osueiqnt is ,6 naesm ncoosaitsai

reehw si odsd traoi ? )a at hte aet -onidoetkdcio kdrni limk n.moucl nceeh the ena,wrs ylon ooikec ilepdennyednt ssa. ihwt e lcio

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 +0  upvote downvote
submitted by tyrionwill(22)
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we cna akem shntgi epmisl kiel htsi wfi:y a we nawt to nkwo ewehthr 1or,X X2 rrcetolaes Y, we utjs alyetspera ttse X1 and Y, adn 2X nda Y .dyocranclgi nhW e tset X1 iwth Y, we eqirrue on X2 uxop;eser Wenh test X2 htiw ,Y we rrieqeu on 1X xo;epruse

We etst ioocke with ieaahrrd, nehw kmil was otn kndru o(tp hitr)g: veiptsio We stet lkim iwth ia,rhaerd newh no kioceo saw taeen oewl(r )trghi: iegvneta

:cucnisnloo onyl ooeikc rasocrltee to the raedahir

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh oekwyrd is ).E"cNoNLNsT"YeEiIPDd(atsEaD Wchih ni maunh ugnalgea nsmae T"ON CEADA.TISOS"

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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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